In other words, the frequency is the speed of the RAM expressed in MHz. The higher the frequency of your RAM the faster its performance will be.
Take note that there are different types of RAMs with different frequency. As apps and software require RAM in order to run and for you not to experience any lags you will need to have sufficient amount of RAM. If you PC is working slower than normal, there are numerous reasons why this could happen and one of them could be due to heavy RAM usage.
