when it comes to writing text for my free site descriptions do you think it is better for me to write about the niche of the free site i have built or the models i have used on them or the paysite i am linking to or the pictures or movie or a collection of them all

right now i am trying to write about the models i am using in the pics on my websites trying to describe what they are doing but i am thinking maybe i should be writing about the niche itself to get more traffic from the search engines to my site do you think this will work well