Pop-ups (modals) can impact your website's search rankings, but they aren't inherently bad for SEO when used correctly.

ihr sollt you are supposed to, ought to, should (plural, informal) Sie sollen you are supposed to, ought to, should (singular or plural, formal) sie sollen they are supposed to, ought to, should ...

ihr dürft you may, you are allowed to (plural, informal) Sie dürfen you may, you are allowed to (singular or plural, formal) sie dürfen they may, they are allowed to ...