Full URL: https://steamcommunity.com/id/msart/
SteamID logs down community URL history so you can see where a URL has been used multiple times providing SteamID has seen and logged this.
This has been great to track down scammers or cheaters where they are banned but they setup a copy of the profile they used before and include the same URL they previously used.
It is also interesting to see what other variations of URLS are used as SteamID will show similar URLS if there are matches, which is also great for tracking down alts which may have setups such as url1 , url2 , url3 and so on.
there are many use cases for the URL history.
This URL's history has been modified - This means some links to a SteamID can no longer be made.