With Gmail you can add a plus to the end of your email address followed by a label I.E. example+label@gmail.com. This works the same as your regular email but you can use the plus label to filter or automatically delete mails. It’s also useful when you don’t trust a company to add the company name after the plus to see of they sell your email to third parties.

this page explains aliases better than i could https://simplelogin.io/

and this page is for plus addresses https://eit.ces.ncsu.edu/2023/02/gmail-plus-addressing-the-hidden-feature-that-can-help-you-get-more-out-of-your-inbox/

If you give your email as you+amazon@email.com then it will still receive it at you@email.com but now you know who sold it if you start getting spam sent to it.