Whenever an application is executed on a server, it's loaded into the physical memory. If you run a resource-demanding script, or if you simply add more scripts on your websites and you get lots of visitors, you could encounter a scenario where your Virtual Private Server has insufficient memory to run all the programs and freezes as a result, which means your websites shall stop operating adequately 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 you can use without changing the entire plan. That way, you may pay only for the resources you actually need rather than for additional disk space or higher CPU speeds that you shall not really use, for instance. With the upgrade, you could guarantee the flawless functioning of your sites, which also means a better experience for your site visitors.