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# How to use Regular Expression in Stock Sync?

**What is Regular Expression RegExr?**

* Expression of a pattern in a string using special characters and words.
* For example, ([A-Z])\w+

**Which fields can Regular Expression be used in Stock Sync?**
* [Product Identifier](https://help.stock-sync.com/en/article/product-identifier-field-z71wxk/) 
* [Product Title](https://help.stock-sync.com/en/article/title-field-4h88lw/)
* [Description](https://help.stock-sync.com/en/article/description-field-1qida1w/)
* [Tags](https://help.stock-sync.com/en/article/tags-field-tz7x6l/)

**How to use the Regular Expression?**  

The user can use this [https://regexr.com/](https://regexr.com/)  
  
| For example: If the user wants to ignore the word "CBD6581-MI" from CBD6581-MI Queen Sized Bed Frame - Charcoal Velvet. So the user can use this online RegExr to test it out.

![](https://storage.crisp.chat/users/helpdesk/website/61ff305110288000/b847056c-752c-440f-8cf3-d1f9e3_1mp2yle.png)

From the above image, the user can see that this expression **"^[A-Z]+[0-9]+[-]+[A-Z]+[A-Z]+[ ]"** will be ignore the front word **"CBD6581-MI"**.  

To remove the comma from the sentences as below:

HP Elitebook 840 G8, 14""FHD, i5-1135G7,8GB, 256GB SSD, LTE 4G

                                              to

HP Elitebook 840 G8 14""FHD i5-1135G7 8GB 256GB SSD LTE 4G

Please wrap the regular expression with *

For example: `*^"|\,|"$*`