HOW TO INCREASE YOUR PHONE MEMORY
This increased RAM helps you run several applications in the background. Your phone's performance won't magically improve though.
For increasing RAM in this manner, you need a bit of technical expertise and knowledge. High-end smartphones nowadays have a feature to expand their RAM virtually.
What all this means is that the more RAM you have, the more apps you can keep in memory simultaneously without Android killing off older apps. Less RAM means that Android needs to remove apps from memory more frequently.