You will get more responses if you ask a specific question. But just looking at your shop first page I see your titles have only the name of the piece. You need to say what it is (oil painting? acrylic painting?) also the main colors, the words original, art, abstract, landscape, modern, etc., whatever applies, and the size in inches and the material used (canvas, wood, paper, etc.) I wouldn't put the name of the piece in the title, just in the text, because you only want words in the title and tags that people are going to use to search for what you have.
The best thing you can do is look at some shops where the person is selling their own artwork and is doing well. Look at their titles and tags and text. Also look at policy pages from a number of different shops. I didn't look at yours but usually new sellers don't fill this in and it's important to avoid future problems.
