Let's say you have a 100k email list that you need to validate and score via ZeroBounce. You first validate the file via the normal process of removing all invalid emails (API or bulk upload).
Let's say your email validation results look like this:
Normally, you should only email the Valid file. With ZB A.I. you can now start mailing also the catch-all files, starting with QS 10 and working your way down from that until you decide that the bounce rate is no longer acceptable.
We recommend to never send emails to emails that have a quality score of 0.
Keep in mind a quality score of 0 doesn't mean the email is invalid, they can be spam traps, they can be inactive emails, they can be disabled emails and many other reasons. Our A.I. determined them to be very low-quality emails that will have much lower engagement collectively then high scoring emails.
Emails that score high, tend to have much higher engagement. Think about it, if an ESP sees people opening your emails, engaging with your email. You reputation improves and thus your in-boxing improves.