It means the individual number connections to their server. Sometimes users need more connections in order to max out their speed. But nobody needs 50 connections. That number is just marketing. Ideally you want to use the least amount of connections that allow you to max out your speed. On average it can run anywhere from 8-12 will allow you to max out your speed. The number can be different for everyone though. Add or subtract the number of connections that work best for you. Try to figure the minimum needed that allow you to max out your speed. To many connections can affect your computer/internet performance.