Why do websites have the following features…?

exactly why do web pages have:
1)games
2)feedback sorts
3)advertisements with regard to other websites

1)People love to play games in case the web site has good games the greater people they will get to see and if it can be offering anything besides games a minimum of a lot of the people will check out the total site.
2)They make it possible for the owners find out what they tend to be doing appropriate, what they may be getting incorrect and recommend ideas regarding improvemen
3)You can earn money from marketing and advertising other internet sites.