Whenever an app is executed on a web server, it is loaded into the physical memory. In case you run a resource-demanding script, or if you just add more scripts on your websites and you get a lot of visitors, you might encounter a case where your Virtual Private Server has too little memory to run all the applications and freezes for that reason, which means your websites shall stop functioning effectively and that the 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 your entire plan. This way, you'll be able to pay just for the system resources you actually need and not for additional disk space or higher Processor speeds which you will not really use, for example. With the upgrade, you could ensure the faultless performance of your websites, which also means a better experience for your visitors.