Tell me whether it is realistic to develop your business with the help of the site? What should a business site be like?

The site should have your logo, your photos and videos and your text.

I used shopify watch stores https://www.templatemonster.com/category/watches-shopify-themes/ for my business. Using ready-made templates for the site has significantly reduced the time and cost of creating the site.  I do the filling of the site myself. My business is growing.