For example, you can do janesmith+beauty@gmail.com and janesmith+news@gmail.com when you sign up for something, and the emails will still go to janesmith@gmail.com. The difference is that with a specific email address for your beauty subscriptions, like janesmith+beauty@gmail.com, you can create a label and filter rule to clearly sort how certain subscriptions to this email address appear, which inbox they go to, and how these emails get deleted or archived.
Article source: https://www.huffingtonpost.co.uk/entry/how-to-mass-unsubscribe-gmail-emails_uk_6a034a1be4b0cdaf88db1b11