If your site does not have a Reputation, it means that not enough users have rated it.
First, If you have claimed the site as your own, you can request a review here: Here
Then, the best way to start is to ask your customers and friends to rate your site via the site's scorecard/Extension.
*Please note: WOT ratings are calculated based on multiple parameters, with the number of reviews being one of them.
We are using cutting edge technology and dedicated Machine Learning algorithms to identify which users are more trustworthy and which are not, helping us successfully fight spam and rating manipulations and identify real users.