Stamps Collection
A stamp is a pixelated rectangular graphic, made to look like a, you guessed it, stamp. They are used to express one's identity, interests, opinions, and/or fandoms, and they were often placed on blogs or personal websites.
They were really popular on DeviantArt in the late 2000s-2010s. Nowadays they're not as popular as they were back then, but if you're looking at this website, you probably won't even notice.
I'd say stamps are a crucial part of the current day 'old web revival' scene. Any Neocities site you see will probably feature a little 'Stamps' section. Just like this one!