Computer ram size is measured in GB. The more GBs of computer ram that is available, the more things at once the computer can do because there’s enough space for all of them to be running concurrently. RAM also speeds up your computer because it doesn’t have to pull desired files in and out of storage when they’re in use if they’re already in the computer’s memory.
For example, say you have a low pixel quality video editing program open on your screen with many transitions added to the video clips you want to edit so their chronological order will be jumbled when rendered automatically by this program.