I will be brief. Competent and beautiful design to your site is the key to success
• This is status
• This is uniqueness
• This is the minimum risk of consumer loss
• It is much cheaper than a cool interior (if you compare a stationary store and an online store)
There is a lot of marketing research on the topic of Internet resources. For example, where it is better to place the Buy button and what color to make it. Or which font is more pleasant to read (size, indentation). Experienced designers study and know everything.
If you order website development, be sure to start with the design, as The cost of the site depends on how it will look!