When designing a website, it is easy to get carried away with fancy moving parts and bombarding people with too many adverts, but it is important to remember what the main aim of the site is.
Statistics show that more and more people are using mobile devices to view and interact with websites. So not only does your desktop site need to work and perform well but also your mobile version of the site. It needs to be responsive meaning that the layout will change depending on the size of the screen it is being viewed. You can even go that step further and ask the programmer about making an App for your company that people can download and use on mobile devices. This can be costly, so you will need to evaluate if it is worth while doing for your business.
The navigation of the site is vital and ideally it should stay in the same position on every page so users have an easy way to navigate through the rest of the site.
Make sure you keep track of your analytics which can highlight any pages that are not working well and have a high bounce rate.