Whenever an app is executed on a hosting 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 a lot of visitors, you could encounter a scenario where your Virtual Private Server has not enough memory to run all the applications and freezes as a result, which means that your websites shall stop working properly and that the website visitors shall start seeing error messages. To avoid such a scenario, you may take advantage of the RAM upgrade that we are offering and increase the amount of physical memory for your use without changing the entire plan. This way, you can pay only for the system resources you actually need rather than for additional disk space or higher Central processing unit speeds which you will not really use, for instance. With the upgrade, you could guarantee the faultless performance of your websites, which also means a better experience for your website visitors.