My 1st question
What is the importance of the stars and how do they increase
2 question
I got 4 stars in the last month. Is it a good thing or im just too much free
3rd question
How long does it probably take to get 4 stars
Stars are meant to represent user activity. You typically reach 4 stars within 250 posts, but that number can go up or down depending on how upvoted/downvoted your posts are. Chronicle, for example, has made 1 thread, but because it has over 1000 upvotes he has 4 stars.
Any post adds to the tally. If you go to your profile it'll tell you how many posts you currently have. You can access it by either clicking your name on any post you've made, or by clicking the profile icon at the top of the page