Apart from the honking great big ads for this guy’s Audacity course, this is a very useful video that just talks about the need for a pop filter.
He also talks about other types of filters that can be used, including foam windscreens.
Toward the end, he mentions about how you can make a pop filter for yourself. This is a method that a lot of others have tried. After all a pop filter is a rather simple device.
But if you don’t want to make one, or want something that looks a little nicer, then pop filters are inexpensive. I talk about one such filter here. That one comes with a really useful added extra.