Hello all .. Im new to forum .. but I totally love it so far !

I am trying to understand the whole keyword thing and I need some advice ...

Ok so if I type in a particular long tail keyword and the response says 112,000,000 sites with that LTK .. there are a couple paid ads there too .. but then I type same long keyword into googles keyword tool and it comes up
with 0 competition and global & local search volumes are "Not enough data"...
lol

So .. Im confused lol .. does this mean there are supposedly never any searches ever for that LTK ? Any advice on a great tutorial to understand the keyword MAGIC! lol

Thank you all so much!

Tammy