Example, say the keyword with most searches and highest competition is this:
get rid of annoying girlfriend
If I build lots of backlinks for that keyword alone, will I then rank good for these keywords automatically:
get rid of annoying girlfriend fast
how to get rid of annoying girlfriend
how to get rid of annoying girlfriend fast
...and so on, and so on.
Know what I mean? If I focus on one "core" keyword, can I achieve a bunch of good rankings for various long-tail keywords?