Please review my gigs and tell me how should I improve it…
Well, first of all, you can start by being a little more specific in what you do and by proof-reading your texts. You call yourself a designer, but most of your gigs relate to development - that’s a first throw-off.
I suppose you are not a native english speaker, but I strongly suggest paying more attention to your grammar and phrasing (your first feedback relates to this). Buyers want to make sure you understand them, since they will be handling you personal information such as their WP login.
Be sure to check out the Fiverr Academy and do a little bit of research on the forum. I’m sure you’ll find lots of helpful tips.