what does it mean when the system sends me a message saying I have been upgraded to trust level

this is what it says
It’s a basic filter thing so that bots can’t create hundreds of accounts and spam the forum with posts. So for example as a new user you have to view the forum and read some topics before you can create posts. I’m not sure exactly what the trust levels gives access to when reached but that’s the general idea of them at least :)
Edit:
Another user made a post about it two years ago, not sure if the information is still correct but here it is: