Getting close to mic and speaking consonants that need too much wind such as P, B, T and D can improve the possibility of making something known as a plosive. Plosives are annoying when they make their way into your audio. Even if there are other techniques to minimize plosives, using a pop filter (a nylon or metal mesh placed around a loop) in front of the mic is the most effective way to eliminate the wind out of your speech.