Contributor level (to the database)
1 star = Contributor = auto assigned when you did one "edit"
2 stars = Power Contributor = when changes you make are matching the database rules (eg. understand topics) and you frequently make changes. I once did review every single change, 2 star changes would be skipped in the review process.
3 stars = Star Contributor (fully understand rules and specific functionality is needed = merging 2 kits. And can handle the "dangerous" features with bad UI. Also can see history in who did what, and communicate well in case mistakes are made)
There used to be more difference between the 1, 2 and 3 stars. Many of these differences have been removed over time.
There are likely users still on star 1, who should be a 2.
Main thing: do not worry about your stars!
Repeat... do not worry about your stars!
2. July, 19:11