Whenever an application is executed on a web server, it is loaded into the physical memory. If you run a resource-demanding script, or if you simply add more scripts on your sites and you get lots of visitors, you could encounter a situation where your Virtual Private Server has insufficient memory to run all the apps and freezes for that reason, which means your sites shall stop functioning effectively and that the visitors shall start seeing error messages. To avoid this kind of a scenario, you can take advantage of the RAM upgrade that we're offering and increase the amount of physical memory at your disposal without changing the whole plan. This way, you can pay only for the resources that you actually need rather than for additional disk space or higher CPU speeds that you will not really use, for instance. With the upgrade, you could ensure the faultless performance of your websites, which also means a better experience for your visitors.