Whenever an app is executed on a web server, it is loaded into the physical memory. If you run a resource-demanding script, or if you just add more scripts on your sites and you get lots of visitors, you may encounter a situation where your Virtual Private Server has insufficient memory to run all the programs and freezes because of this, which means that your websites will stop operating correctly and that the visitors shall start seeing error messages. To avoid this kind of a scenario, you could take advantage of the RAM upgrade that we're offering and increase the amount of physical memory available without changing the entire plan. That way, you can pay just for the system resources you actually need rather than for additional disk space or higher CPU speeds that you will not really use, for example. With the upgrade, you could guarantee the flawless performance of your websites, which also means a better experience for your website visitors.