As an example let’s assume that you own a coffee shop. I am talking about a physical, an actual shop here. Now you want people to come to your coffee shop rather than Starbucks located at the end of the road.
Well, if Starbucks is your competition, then you surely need something very powerful to attract. From piercing fluorescent overhead lights to unforgivingly amazing concrete floors, you would want everything to send the best impression that can win your clients easily and make their stay at your coffee shop a lot enjoyable.
Did you get my point? Same is the case with the website, you have to focus on every detail, from design to layout, from fonts to colors, from logo placement to content, even the minutest details. In short, these are actually the web design best practices that you must implement on your site.