What does A/B testing includes
- create one test suite that contains alternative variant of tested feature (you can test up to 5 alternatives, just select more gigs)
- make required changes in source code
- running test until winner variant is found or until specific date is reached
What changes can be tested
There could be variety of changes, that can help you to increase your profit, like change button colors, hide/change specific text, selecting different images, etc.
What can I guarantee
I can test different variants of your website to determine if they affect your customers behavior. I can't promise that changes will do much better performance, or that any significant change will be seen. AB testing is for validating ideas only.
How long will it take to see results
It usually takes 2-4 weeks to see if alternative version makes any changes, but that time will differ based of your website traffic (results will be visible faster if you have lot of users)