The Rate of Loading Pages will be Faster
For a Better Look and Feel
With their cleaner, simpler designs, minimalist themes look and feel better than heavily loaded, complex designs. A complex theme can look as good as a minimalist theme but think of how easy it is to maintain a minimalist theme since its going to be easy customizing it compared to a complex theme. Setting up a minimalist theme is as easy as 1-2-3, in minutes you will impress your visitors with their beauty and simplicity. A good example is the range of Elegant Themes products; they are simple and clean.
It Makes it Easy for People to Use a Site
Minimalist WordPress themes invite people to use your site due to the fact that they are not cluttered with unnecessary information, so people will find it easy locating important links, and what is easy to find is clicked first. A good example that has worked is creating a stripped-down version of a site using minimalist themes then use a DNS trick to direct half of your traffic the minimalist site. The outcome most of the time was visitors stayed longer on the site with most of them clicking on links that lead to other content.