I don't do a ton of freelance work. But I do some. I specialize in helping people fix their sites up. Which usually means, taking a site that wasn't designed very well, and redoing it, while keeping the look and behavior the same as it was. Or just keeping the content and using a completely new, more modern template.
An example would be a site that was entirely developed and exported from Photoshop, or something, and is just a big collection of HTML files, with no central modules. A site designed this way can be difficult, if not impossible, to manage or make edits. Not to mention that it's not flexible or scalable at all.
What I do is centralize the common elements like, header, footer, navigation, etc... Change the language to PHP (or ASP), and take advantage of the features the server side code allows. This also opens the opportunity to use MySQL database integration, which would not be possible otherwise.
Most recently, it has become extremely important to have a mobile friendly version of the entire site. This is actually the industry standard now. Design for mobile first, and think about desktops second. What this means today is that all sites must be as responsive as possible.
The term 'responsive' means that the site will automatically stretch and reorganize to fit the screen no matter what size, and also if the screen changes after the page is loaded. It responds. Today's modern designs all need to be mobile designed and responsive first.
There is much more to say about this, and some much better examples of the type of work I do on the site specific to web design and hosting. Last year I took the step to handle hosting services myself. For more information, please see affordablesharedhost.com, or follow the ad below.