Spyfu

It gives you a quick snapshot of how much your competitor is spending and what keywords they are targeting. You can also come up some new paid keywords idea from this wonderful tool, though you have to pay if you want to know all the keywords the competitor is paying.

It is good at understanding this factor:

•    Keyword Competition
•    Relevant keywords

Tool for landing page optimisation

Once you have your PPC campaigns alive, traffic will go through if keywords are well-targeted and ad copies are well-written. But will these traffics convert? You might say: I hope so! We cannot hope, instead, we need to test and improve.