Hi sir I'm Andrew nice to meet you.
The source of the visitor / customer conversion can be any one, ranging from the website design to it's usability, user friendly interface, product presentation, information etc.
I can review your websites and prepare a list of improvements on multiple levels for each website.
I also do web design, development and much more, after we go through the evaluation of your websites we can also help with design / usability and many more issue solving.
Thank you for your time, please don't regard the lack of Freelancer.com feedback as a impediment, I'm quite new on this website but I've worked for clients outside this source a lot.
Also check PMB.