Let's break this down: an impression is when your gig is displayed among all other gigs, and a click count is when someone clicks inside your gig.
While order is self-explanatory.
So, depending on the situation, you should figure it out.
1. Low impression, your gig is not visible; change keyword, rating, and so forth.
2. A high impression but a low click or order indicates that your image/title has to be improved.
3. Low order, high click. Everything else besides the title, image, keywords, and rating.