If you want a short answer to this question then I'd say - GOOD COPY SELLS. In all my years of working with web design, I simply can't stress this enough. As Forbes writes,
Website visitors won’t make an effort to read your entire site’s content ...they’ll only give you a few seconds — in fact, visitors may form an impression of your site in as little as 50 milliseconds.
Your website copy has an important job, and just milliseconds to do it. When creating your website, equal attention should be given to the design and copy that your write. Good copy reflects your business values, tells that visitor what makes you different, and creates an impact that, eventually should drive them to convert to a paying customer.
And did I mention that using copy that is clear and concise is a must?
If you are still contemplating whether you should write the copy yourself or get professional copywriting services, here are a few reasons why I believe that skilled copywriting is essential when designing or redesigning your business website:
Build an impressive brand image
Set your tone, brand personality, and make yourself relatability to your target consumers with the way you structure your copy. Content that is average will reflect your company in a "meh" manner. The same holds true for web copy that is written with errors, looks sloppy, or feels rushed.
Create value-driven content
Every sentence on your website has to serve a purpose in order to get readers hooked – you only get one chance to create the right impression and effectively showcase your business.
Every page on your website has an important purpose. The "About Us" page is meant to be informative and tell your story as a brand/company/team, but the "Products" page, on the other hand, is meant to make your product(s) stand out and sell. Professionals know the difference in content between these 2 pages and create unique content accordingly.
Tap into your audience’s mind to drive sales
Copywriting is about communicating with your target audience. Simply stating facts about your company is ineffective as most audiences expect personalized content.
Experienced copywriters know that if they are creating copy for a construction company - their tone of voice and overall message will not have the same tone as the content they create for a yoga studio.