It’s better to do it ASAP before they’re decreed abandoned. Dig thorough everything and also check your State’s Unclaimed Property dept (or the one for whatever state you were working in I suppose). And/or do some searching online to find out how to reclaim them.
I think the idea is that you won’t even leave the Google page at all, they want to keep you on their site and serve you their ads instead of sending you to someone else’s site and giving someone else that sweet sweet ad revenue.