I little more detail might help.
if you mean buffering when watching YouTube videos etc. then if your computer is towards the minimum recomended RAM then increasing your ram may help a little, but realistically speaking the only way to eliminate buffering is to get a faster internet connection.
on YouTube if you pause the video as soon as it starts playing and then wait a couple of minutes so it can load a decent amount of the video and then continue playing you may find it stops buffering mid video