Pop filters are material -- usually mesh or foam -- used to prevent "popping" sounds on recordings. Pop filters also reduce the effects of breath blasts or air currents from appearing on your recordings.
Pop filters are usually placed a few inches in front of the microphone. Pop filters from music stores include stands that allow you to simply anchor your microphone where you want without disconnecting it. To use the pop filter, you need a desk, table or other flat surface where the filter stand can sit. For best results, make sure that the pop filter is not sitting too close to the microphone. Alternatively, you can buy a pop filter that clamps directly onto the microphone. Either way, you will still be able to anchor your microphone in your desired location.
You can buy pop filters from your local music store or on the Internet. If you buy from a local music store, take your microphone into the store with you. You may prefer the pop filter that clamps directly onto the microphone. If one cannot be clamped onto your microphone, you will have to buy a version that comes with a stand.
Even if you cannot afford to purchase a pop filter, you can construct one at home. You merely need a frame for the pop filer, along with material used to actually filter the audio. Thin nylon -- such as women's stockings -- works well for the filter's material. You can construct the frame from a bent coathanger.