Things I'd do, improve the menu at the top so that it looks more professional and cohesive with the site. That includes changing up the font type and size, along with better positioning. Underneath the slider, have maybe a description setup so that people know what your company is about. beneath that maybe have the 3 main products that you're selling being shown so that they can easily access those. under that then a call to action of some sort for them to sign up to a newsletter, or visit the shop page easily. for the product pages, I'd change up the fonts and buttons to go along with the color of your logo.
it looks like most of the shop pages are off centered too so I would fix the alignment on those. Maybe place the content inside of a white box and then have the left and right side as the grey border like the current background is.