Whenever a program 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 sites and you get lots of visitors, you might encounter a situation where your Virtual Private Server has too little memory to run all the apps and freezes as a result, which means your sites shall stop operating correctly and that the site visitors shall start seeing error messages. To avoid this type of a scenario, you'll be able to take advantage of the RAM upgrade that we're offering and increase the amount of physical memory at your disposal without changing the entire plan. This way, you may pay just for the system resources you actually need and not for additional disk space or higher CPU speeds which you will not really use, for example. With the upgrade, you could ensure the faultless functioning of your sites, which also means a better experience for your website visitors.