pronunciation of "it"

can anyone give me a detailed explanattion of the pronunciaiton of the word "it" ... most of times I hear "it" it's silent.

If you pronounce it clearly "it" is pronounced /it/ but as often happens to small words like this, it's commonly shortened to almost nothing in everyday speech. The whole word can sometime get reduced to the sound of the IPA's schwa /../.

The "t" is usually "unreleased". When you pronounce a full (released) "t", you stop the flow of air suddenly, then slowly let the air out to make a hissing sound. With the unreleased "t", you don't let the air out.
The position of the tongue is the same with both types of "t".

it is like nit but without the n.

and you, scottish, are like "it" but with tw.

oh hahahahahahahaha good show old chap you fucking ponce

Scottish, as you aren't here to help, I can only conclude you're here to learn English. Good luck!