Whenever an application is executed on a web server, it's loaded into the physical memory. In the event that you run a resource-demanding script, or if you just add more scripts on your sites and you get loads of visitors, you may encounter a situation where your Virtual Private Server has not enough memory to run all the applications and freezes for that reason, which means that your websites will stop operating correctly and that the website visitors shall start seeing error messages. To avoid such a scenario, you could take advantage of the RAM upgrade that we are offering and increase the amount of physical memory at your disposal without changing the whole plan. That way, you can pay just for the resources which you actually need rather than for additional disk space or higher CPU speeds which you won't really use, for instance. With the upgrade, you could guarantee the faultless performance of your websites, which also means a better experience for your visitors.