# Rules **URL:** https://forum.mergado.com/c/knowledgebase-faq/rules/55.md [Latest](https://forum.mergado.com/latest.md) · [Categories](https://forum.mergado.com/categories.md) · [Tags](https://forum.mergado.com/tags.md) --- ## [Bulk rewriting by values](https://forum.mergado.com/t/bulk-rewriting-by-values/488)
**Author:** [@petrmindl](https://forum.mergado.com/u/petrmindl)\ **Replies:** 1\ **Last updated:** [August 27, 2025, 11:13am UTC](https://forum.mergado.com/t/bulk-rewriting-by-values/488 "2025-08-27T11:13:43Z")
Description This rule allows you to completely overwrite the original element values based on values in another element. This is a very versatile and useful rule which is often used. Use If we want to set different … --- ## [Set product parameters](https://forum.mergado.com/t/set-product-parameters/477)
**Author:** [@veronika\_kusalikova](https://forum.mergado.com/u/veronika_kusalikova)\ **Replies:** 0\ **Last updated:** [June 24, 2022, 12:14pm UTC](https://forum.mergado.com/t/set-product-parameters/477 "2022-06-24T12:14:31Z")
In this post we will learn: What is it used for? How does the rule work? Examples of use What is it used for? As the name suggests, the rule is used to set product parameters and their values. In the rule, it is possi… --- ## [Rename categories in bulk](https://forum.mergado.com/t/rename-categories-in-bulk/489)
**Author:** [@petrmindl](https://forum.mergado.com/u/petrmindl)\ **Replies:** 1\ **Last updated:** [August 27, 2025, 10:48am UTC](https://forum.mergado.com/t/rename-categories-in-bulk/489 "2025-08-27T10:48:37Z")
Description Many e-shops use own category tags, but some search engines indicate a clear specification of the CATEGORYTEXT element content. This rule makes editing easier for you. For ease of work, this rule allows you… --- ## [Remove parameter values](https://forum.mergado.com/t/remove-parameter-values/1199)
**Author:** [@veronika\_kusalikova](https://forum.mergado.com/u/veronika_kusalikova)\ **Replies:** 0\ **Last updated:** [August 26, 2025, 11:02am UTC](https://forum.mergado.com/t/remove-parameter-values/1199 "2025-08-26T11:02:40Z")
In this post we will learn: What is it used for? How does the rule work? Examples of use Summary What is it used for? The rule is used to clean up data from the feed, specifically to remove parameter values. Individua… --- ## [Merge variants rule](https://forum.mergado.com/t/merge-variants-rule/967)
**Author:** [@veronika\_kusalikova](https://forum.mergado.com/u/veronika_kusalikova)\ **Replies:** 0\ **Last updated:** [May 14, 2024, 7:36am UTC](https://forum.mergado.com/t/merge-variants-rule/967 "2024-05-14T07:36:10Z")
How to merge item variants In this post you will learn: What is the use of the rule Merge variants of items How to recognize a format that is so-called variant Setting the Merge variants rule Example of the most commo… --- ## [Applying rules](https://forum.mergado.com/t/applying-rules/492)
**Author:** [@petrmindl](https://forum.mergado.com/u/petrmindl)\ **Replies:** 0\ **Last updated:** [June 24, 2022, 12:54pm UTC](https://forum.mergado.com/t/applying-rules/492 "2022-06-24T12:54:21Z")
Whenever you make changes in Rules , i.e. create a new rule, edit an existing rule, delete a rule etc. you need to click the "Apply rules " button in order for the changes to apply. This way Mergado will process the chan… --- ## [The Add a value to a multi-value element rule](https://forum.mergado.com/t/the-add-a-value-to-a-multi-value-element-rule/588)
**Author:** [@lehuy](https://forum.mergado.com/u/lehuy)\ **Replies:** 0\ **Last updated:** [September 27, 2022, 7:24am UTC](https://forum.mergado.com/t/the-add-a-value-to-a-multi-value-element-rule/588 "2022-09-27T07:24:45Z")
In this post, we will learn: How does the rule work? Structured value addition Most common uses Summary What is it used for? The basic principle of the rule is that it adds an additional value to the existing element … --- ## [Bulk copy values](https://forum.mergado.com/t/bulk-copy-values/535)
**Author:** [@lehuy](https://forum.mergado.com/u/lehuy)\ **Replies:** 0\ **Last updated:** [July 11, 2022, 2:17pm UTC](https://forum.mergado.com/t/bulk-copy-values/535 "2022-07-11T14:17:24Z")
In this post, we will learn: How does the rule work? How to copy a structure? Most common uses Summary What is it used for? The basic principle of the rule is that the Mergado Editor takes the values from the selected… --- ## [Data file import](https://forum.mergado.com/t/data-file-import/476)
**Author:** [@petrmindl](https://forum.mergado.com/u/petrmindl)\ **Replies:** 0\ **Last updated:** [June 24, 2022, 12:09pm UTC](https://forum.mergado.com/t/data-file-import/476 "2022-06-24T12:09:41Z")
Description Using the Import data file rule, you can use a CSV file to import edits to existing items. We dedicated a separate article to the rule. --- ## [Remove accents and diacritics](https://forum.mergado.com/t/remove-accents-and-diacritics/534)
**Author:** [@petrmindl](https://forum.mergado.com/u/petrmindl)\ **Replies:** 0\ **Last updated:** [July 11, 2022, 2:14pm UTC](https://forum.mergado.com/t/remove-accents-and-diacritics/534 "2022-07-11T14:14:59Z")
Description This rule can be used to remove diacritics and other characters in the text and replace them with equivalents from the “standard” Latin alphabet (i.e. the characters defined by the ASCII table). --- ## [Rules in Mergado](https://forum.mergado.com/t/rules-in-mergado/494)
**Author:** [@veronika\_kusalikova](https://forum.mergado.com/u/veronika_kusalikova)\ **Replies:** 0\ **Last updated:** [June 24, 2022, 12:56pm UTC](https://forum.mergado.com/t/rules-in-mergado/494 "2022-06-24T12:56:38Z")
Rules In this post we will learn: What are rules? What do I see on the Rules page? How to create a new rule List of rules and their most common uses What is good to know Summary What are rules? Our smart rules are one… --- ## [Order of rules](https://forum.mergado.com/t/order-of-rules/493)
**Author:** [@petrmindl](https://forum.mergado.com/u/petrmindl)\ **Replies:** 0\ **Last updated:** [June 24, 2022, 12:55pm UTC](https://forum.mergado.com/t/order-of-rules/493 "2022-06-24T12:55:11Z")
Rules are applied from the top down, i.e. if some of your rules overlap in their function, it is the lower rule that will have the last word. You can change the order of rules by dragging & dropping. You can also tem… --- ## [Rewrite](https://forum.mergado.com/t/rewrite/491)
**Author:** [@petrmindl](https://forum.mergado.com/u/petrmindl)\ **Replies:** 0\ **Last updated:** [June 24, 2022, 12:51pm UTC](https://forum.mergado.com/t/rewrite/491 "2022-06-24T12:51:56Z")
In this post we will learn: What is the Rewrite rule used for? How does it work? Examples of use Summary What is it used for? The rule is used to modify the values of any element, e.g. product names, categories, label… --- ## [Find and replace](https://forum.mergado.com/t/find-and-replace/490)
**Author:** [@petrmindl](https://forum.mergado.com/u/petrmindl)\ **Replies:** 0\ **Last updated:** [June 24, 2022, 12:49pm UTC](https://forum.mergado.com/t/find-and-replace/490 "2022-06-24T12:49:08Z")
Description This rule seeks for text in the element’s content and replaces it with another text. A very useful rule which allows you to remove objectionable content. Use It may happen that your e-shop generates some… --- ## [Bulk rewriting by query](https://forum.mergado.com/t/bulk-rewriting-by-query/487)
**Author:** [@petrmindl](https://forum.mergado.com/u/petrmindl)\ **Replies:** 0\ **Last updated:** [June 24, 2022, 12:43pm UTC](https://forum.mergado.com/t/bulk-rewriting-by-query/487 "2022-06-24T12:43:45Z")
Description This rule allows you to completely overwrite the original values of the element and set new values that will be different for individual product selections. All in one rule. This is a very useful rule that … --- ## [Hide product](https://forum.mergado.com/t/hide-product/486)
**Author:** [@petrmindl](https://forum.mergado.com/u/petrmindl)\ **Replies:** 0\ **Last updated:** [June 24, 2022, 12:35pm UTC](https://forum.mergado.com/t/hide-product/486 "2022-06-24T12:35:57Z")
Description This rule completely hides the output product from Mergado. Use Hiding goods that are not competitive when selling on comparison engines is a way to save on costs. For example, Mergado users use it for g… --- ## [Cost per click pricing](https://forum.mergado.com/t/cost-per-click-pricing/485)
**Author:** [@petrmindl](https://forum.mergado.com/u/petrmindl)\ **Replies:** 0\ **Last updated:** [June 24, 2022, 12:29pm UTC](https://forum.mergado.com/t/cost-per-click-pricing/485 "2022-06-24T12:29:19Z")
Description This rule allows you to dynamically set the cost-per-click from search engines to your e-shop. Good cost-per-click bidding is very important for good advertising results. This rule can work in two ways: … --- ## [Round numbers](https://forum.mergado.com/t/round-numbers/484)
**Author:** [@petrmindl](https://forum.mergado.com/u/petrmindl)\ **Replies:** 0\ **Last updated:** [June 24, 2022, 12:25pm UTC](https://forum.mergado.com/t/round-numbers/484 "2022-06-24T12:25:17Z")
Description Rounds the element content to a certain number of places. --- ## [Letter case converter](https://forum.mergado.com/t/letter-case-converter/483)
**Author:** [@petrmindl](https://forum.mergado.com/u/petrmindl)\ **Replies:** 0\ **Last updated:** [June 24, 2022, 12:23pm UTC](https://forum.mergado.com/t/letter-case-converter/483 "2022-06-24T12:23:58Z")
Description Letter case setting. The rule is very simple and intuitive. Nothing special needs to be added to its function. --- ## [Truncate value](https://forum.mergado.com/t/truncate-value/482)
**Author:** [@petrmindl](https://forum.mergado.com/u/petrmindl)\ **Replies:** 0\ **Last updated:** [June 24, 2022, 12:22pm UTC](https://forum.mergado.com/t/truncate-value/482 "2022-06-24T12:22:37Z")
Description Truncates the element content to the specified length. The rule is very simple and intuitive. Nothing special needs to be said about its function. --- ## [Set UTM parameters](https://forum.mergado.com/t/set-utm-parameters/481)
**Author:** [@petrmindl](https://forum.mergado.com/u/petrmindl)\ **Replies:** 0\ **Last updated:** [June 24, 2022, 12:18pm UTC](https://forum.mergado.com/t/set-utm-parameters/481 "2022-06-24T12:18:28Z")
Description This rule helps you mark a URL for Google Analytics. When using this rule, you should know that certain changes in UTM parameters may cause product unpairingonsearch engines or an information loss in Googl… --- ## [Strip HTML tags](https://forum.mergado.com/t/strip-html-tags/480)
**Author:** [@petrmindl](https://forum.mergado.com/u/petrmindl)\ **Replies:** 0\ **Last updated:** [June 24, 2022, 12:17pm UTC](https://forum.mergado.com/t/strip-html-tags/480 "2022-06-24T12:17:51Z")
Description This rule removes HTML tags from the element’s content. Use There are often prohibited HTML characters in the product’s label (element DESCRIPTION). That means a mess in pointed brackets, which has no pl… --- ## [Calculation](https://forum.mergado.com/t/calculation/479)
**Author:** [@petrmindl](https://forum.mergado.com/u/petrmindl)\ **Replies:** 0\ **Last updated:** [June 24, 2022, 12:15pm UTC](https://forum.mergado.com/t/calculation/479 "2022-06-24T12:15:46Z")
Description This rule allows you to perform calculations with variables. Use You can also set calculations in Mergado (addition, subtraction, multiplication, division, brackets, and variables). --- ## [Set shipping rates](https://forum.mergado.com/t/set-shipping-rates/478)
**Author:** [@petrmindl](https://forum.mergado.com/u/petrmindl)\ **Replies:** 0\ **Last updated:** [June 24, 2022, 12:15pm UTC](https://forum.mergado.com/t/set-shipping-rates/478 "2022-06-24T12:15:07Z")
Description Using this rule, you can easily set shipping prices. Use Shipping’s price is a key weapon for e-shops advertising on search engines. This rule will help you easily set your transport prices exactly to yo…