Difference between "it" and "this"?

[Tauseef]

Kindly tell me the difference between "it" and "this". When these are used and with which. Thank you sir.

[Mister Micawber]

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This is really too broad a question to deal with here, but much depends on context. Generally, 'this' refers to a specific 'location' in the context or in reality, where 'it' has a non-directional connection to its referent.
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Native English teacher at Mister Micawber's

[Gray]

Which is correct (or preferred)?

1) This is me.

2) It is me.

I know, the latter sounds awkward as we are talking about us and not things. But this applies to the former case too, why is it used widely then?

I heard somewhere that many eyebrows were shot up when a British statesman (Winston Churchill, I guess) used the expression -- this is me.
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First lesson - English, not english. I, not i. ~A student of English

[Kitosdad]

So did Shirley Bassey, and many others. " This is my life ". :D :D :D
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Keep it simple ... Keep it interesting.

[Mister Micawber]

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'It's me' as a telephone identification is idiomatic, I think.
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Native English teacher at Mister Micawber's