For example, if you are a new user you cannot add pictures to your post. You need to do some things until you have earned the right not to be classed as a potential spammer 
Of course you can send me a PM and if I know you are a human I will gladly bump you up a level!
For more details, read it from the source:
I just noticed that there are a couple of users of ClarionHub that are getting close to bumping up a trust level from Basic to Member. You get a cool new badge when you make it there and a couple of new abilities.
At the moment ClarionHub is using the default thresholds for trust levels. The activity here is not so high but they seem to be reasonable suitable anyway. Let me know if you think it is a bit too hard to progress through the levels and I can make some tweaks.
Members keep coming back to the site, and have participated long enough to earn complete citizenship.
This is a shoutout to everyone currently in the Basic group… go, post, like, read!
In addition to the above, it is worth noting that advertising is switched off at trust level 2 or higher. Hopefully the ads are of reasonable quality anyway though!