Popping happens on 'p' and 'b' sounds that can direct a jet of fast-moving air at the diaphragm of the microphone. It sounds like this...

One answer to popping is to angle the microphone so it points at the mouth, but not at the direct stream of the breath. If you position the microphone above the mouth and point it down, this normally works. You can use a pop screen, but this is only recommended if angling doesn't work. But use it if you have to. Foam windshields are not recommended for this as firstly they are not entirely effective, and secondly they color the sound.

Even when there is no popping as such, there is sometimes a slight over-emphasis of 'p' and 'b' sounds. Like this...

...the second 'p'). This is caused as much by the microphone as anything else, so sometimes there is little you can do apart from use a different mic. Often this is acceptable professionally. However, you should improve your technique to the point where you can record 'p' and 'b' sounds completely without popping. Like this...

Download the audio files for these practical project notes...