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# 2.0 What is affected by classifiers?

Classifiers are needed for several things:

*   Allows you to add warning text on the cart page for an individual class. For example, for alcohol, you can add a warning about the need for the user to provide documents confirming the age of majority when receiving an order.
   
*   They affect the display of the icon when adding an order to the cart if an image is not set in the product card. 
    
*   They are necessary to study the taste preferences of customers and further recommend them new positions. 
    



Link to this article: [here](https://dots.crisp.help/en/article/what-is-affected-by-classifiers-1svfj0b/)