There are so many website design companies dotted around the world, it seems every man and his dog is setting up such a company, in fact, anyone with a laptop seems able to offer this service, and the prices for such a service are dropping like flies, you can pick up a website for a few hundred pounds etc.
One of the most overlooked items when looking for a website designer is whether or not any search engine optimizations (SEO) is included, without this your website will never get seen by people/customers searching for the keywords relating to your website/business, this is probably the most important factor when deciding who to get to design your website. You can also visit https://bluematrixmedia.com/website-design/ online to get more knowledge about website designing.
Designing websites today is relatively easy compared to 5 or 10 years ago, you have content managed websites such as Word Press these can be built by anyone with an intermediate knowledge of computers, you do not have to have any website design or html knowledge.
Hence the reason why there are so many website design companies springing up, what these companies don't or can't do is the most important thing to do with a website and that is SEO, the problem is that it takes a very long time to do it right.