I'm going to launch my first adwords campaign. I've been researching and reading but haven't found a good tutorial explaining if it is better to try to go fo a few keywords with high competition and high PPC, or try to go for the "long" tail of lots of keywords with less traffic each but much cheaper.
In theory, having lots of small ones provides more and cheaper traffic according to keyword planner, but... I don't see many people taking this approach.
Any opinions or resources would be greatly appreciated.