Any site optimization means making changes to its work, correcting the working code. It's always a risk. Moreover, each site is unique, and therefore it is impossible to foresee all the options and exclude all errors. This plugin does only what is stated in the description. Read the description of the optimization checkboxes carefully before activating them, make sure you understand what you are doing and everything will be fine. In any case, you use this plugin at your own risk.
The plugin is and always will be free.
The plugin SpeedPlus AntiMat checks the text of comments when they are added and, if it detects obscene words, replaces them with the word you specified. Only Cyrillic is supported. The SpeedPlus Check Woo Phone plugin checks the customer's phone number on the WooCommerce Checkout page against your rules: phone number length, characters used in the number, the mandatory beginning of the phone number.
If you wish, you can buy me a coffee.