To get the best results, it is important to choose an appropriate type of mic for the job, and to use it correctly. Performers (especially vocalists) may also have their own preferred microphone technique sometimes without realising the effect that this has on the amplified sound.

One thing that everyone agrees on, though, is that the distance between a microphone and the sound source (your voice) that it is meant to pick-up is a hugely important factor. This is due to a number ofreasons

Few people think about the microphone use when they use it.

All professionals pay careful attention to their microphones whenever they use them.

Don't make the mistake that many amateurs make and use whatever mic is at hand (e.g. using a vocal mic can make or break a vocal sound). Also, don't make the mistake of assuming that using a microphone is easy microphone technique is a learned skill - plugging it in and pointing it isn't always enough.

The microphone is perhaps the most critical part of the audio chain. A good quality microphone will provide you with the basis for an excellent vocal sound, whereas a poor quality microphone will mean poor quality sound, no matter how good the rest of the system is.

Anyone can do it it doesn't matter who you are or what your background is, you can learn how to sing. It is true that for some it might require a little extra effort than for others, but with sound fundamentals anyone can develop their own instrument. The voice is the most unique of all instruments, mainly because there are as many voice styles as there are people. There is nothing as rewarding as discovering what your instrument is capable of.Note: singing is not natural

Singing is a skill-it is something you have to train your body how to do. The reflexes used in singing are not intuitive or instinctual. For this reason you must take time and be patient-you're trying to trick your body into maintaining an optimal singing "shape" that the body is not used to.

Feedback

You can help to avoid feedback by the correct use of microphones. Do not point them at the speakers, and avoid wandering in front of the speakers if at all possible. Maintain a reasonably constant distance from the microphone (except when deliberately varying the distance for effect) Do not wrap your fingers around the basket ( the part you sing into) of the microphone, as this is likely to decrease the microphone's in-built immunity to feedback.

If feedback does occur, the natural reaction is to increase your distance from the microphone. But whether this is the right thing to do depends upon how close you were to it at the time. If you were more than about 4 inches (10 cm) away from the microphone, by moving the microphone further away you are actually increasing the chance of feedback, because the engineer must provide even more amplification to achieve the desired sound level for the audience, and this would make the feedback worse. So decrease the distance ( keep microphone close).  Once you get to know your voice you will use the microphone in a way that suitst your voice. Check out correct and incorrect mic use diagram below.