I will optimize your site speed.
I will create a backup, work in my staging environment in order not to disturb the live website. I will analyze the theme, stack of plugins, server and database for performance issues, then find a way how to fix them, not just install a plugin and call it a deal.
I developed an order tracking system, so you can track the results in real time with before / after tests, list of all changes and recommendations on what to change to improve speed further.
My clients reported that after we improved the responsiveness and the speed of a website, they increased the conversion rate up from 10%