Several studies have found that the left side of the website gets a bigger part of your visitor’s attention. The left side is also looked at first. There are always exceptions, but keeping the left side in mind first is a good starting point. Use this side of your website to display your most important information – for example your Value Proposition.
This study found that the left side of the website received 69% of the viewing time – People spent more than twice as much time looking at the left side of the page as they did the right.