Hello

Essentially backlinks is how many sites are linking to yours.

If you have 500 sites saying for

Johor Maps<-- link this to streetdirectory.com/malaysia/johor, pls visit Streetdirectory.net.my, then you can get very high ranking when someone searches google for Johor Maps.

You are better off if there is only 1 way backlink. Meaning they link to you and not you link to them. Dats call 2 way linking. Google somehow thinks when there is 2 way linking from both sites, its not geniune. But still, its not dat bad especially if the links are related. But try to get 1 way links. Its much better that way.

Some webmasters uses more complicated methods e.g They have 6 to 7 websites and they crosslink using other sites e.g You link to my website A and my website C will link back to u. Then both gets 1 way linking. Smart isnt it.

Hope this helps. Good luck