Here is an incredible Gmail tip to quickly unsubscribe from all the companies you may have unknowingly subscribed to.

Open Gmail in a web browser.

Delete everything in the URL after /mail/ and replace it with /mail/#sub

This will open a list of all the companies you are subscribed to for emails, together with an unsubscribe button for each one.

Source

Another strategy is to delete your gmail account.

Doesn't work for me. I see references to it requiring Google workspace.

I'm almost there... moved everything important over to protonmail a few years back, just haven't deleted my 20 yr old gmail account yet because it's tied to an old phone that I still use for apps and taking cat pics, and in case there's something I forgot to change.

I get roughly 1 or two emails a month from places I'm not willing to give my good email to and that's about it.

The URL was accessable, The list was legitimate and I was able to unsubscribe to roughly 50 companies/lists on a fairly old email address. I don't know results, such as if unsubscribing works, but it looks to be a useful tool. Props.