One of the cool things about Everleap is the ability to run your site from multiple servers and have those servers automatically load balanced. A lot of complicated things take place on the router to achieve load balancing, but in simple terms load balancing is just the equal distribution of the incoming requests across whatever number of servers the site is running on.
For example, if your site is running on two servers (something that’s available for every site on Everleap), and 100 requests come in for the site, 50 requests will go to each of the two servers. That way the incoming load is balanced between the available servers.