Getting confused about the Forum and other sections

Question

Hi,

Can any let me know how exactly this forum site and the other section of the site differs... Its very much confused on using this forum section. There are soo many categories and if any one post a question or an announcement in any section of the category will it be displayed at the index page???

Can any one suggest the best option to get used to this site... :( i have been with c-sharpcorner for the past one month and im totally confused of this forum section with the other sections(like the profile itself gets differed)