Gnasher help, please.

Gnasher, please answer me, what is mean signature under the wallet code on TOP100 richest? I sign it early on many other walletts. But today I saw it under my wallet, but i did not install anything. Please help! Somebody hacked me and installed my wallet? What I must do?

some explorers are trying to match the various different addresses and see how they are linked
The ID number (wallet number) is their way of showing the association

There is nothing to fear.


Thank you very much for answer!