@freddyfazbear20 - Here is a quick paragraph in the Help section that explains Merits:
Link here.
Full text:
Earning merits
On each user page, there is an area that numbers how many merits you have earned. Merits are earned by writing constructive, original, and thoughtful comments in the Games section. We reward those who take the time to think out a good comment, as it contributes to the website and sets a good example. The post does not have to be long, but interesting enough to grab our attention. When you receive a merit, your comment will be highlighted. Only moderators and administrators give out merits. Do not bug the moderators or admins to give you merits. They will most likely cause them be sad for the rest of the day and gorge themselves on cookie dough ice cream.