Whenever an application is executed on a web server, it's loaded into the physical memory. In case you run a resource-demanding script, or if you just add more scripts on your sites and you get plenty of visitors, you may encounter a scenario where your Virtual Private Server has too little memory to run all the applications and freezes because of this, which means your sites will stop operating correctly and that the visitors shall start seeing error messages. To avoid this type of a scenario, you can take advantage of the RAM upgrade that we're offering and increase the amount of physical memory you can use without changing the entire plan. That way, you'll be able to pay just for the system resources that you actually need rather than for additional disk space or higher Processor speeds which you shall not really use, for example. With the upgrade, you'll be able to ensure the faultless performance of your sites, which also means a better experience for your website visitors.