Whenever an app is executed on a web server, it's loaded into the physical memory. If you run a resource-demanding script, or if you just add more scripts on your websites and you get loads of visitors, you might encounter a scenario where your Virtual Private Server has insufficient memory to run all the apps and freezes as a result, which means that your websites will stop functioning correctly and that the website visitors will start seeing error messages. To avoid such a scenario, you may take advantage of the RAM upgrade that we're offering and increase the amount of physical memory you can use without changing your entire plan. This way, you may pay just for the system resources you actually need rather than for additional disk space or higher Central processing unit speeds which you won't really use, for example. With the upgrade, you could ensure the sleek performance of your sites, which also means a better experience for your visitors.