equate to individual people, whereas pages served are just that - the number of pages served within a given period. If your site has 10 distinct pages and I visit all of them I'll be logged as one unique visitor, and there'll be 10 pages requested.
A high unique visitors figure is what you want to aim for. A figure of 275 people visiting your site in two weeks is not bad, but it's not that great either. A busy site may attract tens of thousands (or hundreds of thousands) of unique visitors in that time.
Your site has many problems - some of the links don't work properly, you have no way of returning to the main site from your chat facility, and the thumbnail images on your homepage are awful - they're heavily distorted.
Finally.........you're displaying a statistic that shows 520 people are usaing your site to look for "sex services". That's going to deter lots of people right away, and the whole concept of your homepage is tacky - why do you allow images of scantily clad girls on a site that purports to provide a dating service? If you're serious about this you'll have to make some radical changes, or you'll bever get off the ground. Chat rooms are difficult to control, and you have far too many running at once - why do you need them anyway?