If a competitor is targeting a keyword it is very likely that those keywords are leading to sales (or conversions). If you had this knowledge you could put it to good use:

1) Is there a hot product that you haven’t noticed because you’re too busy trying to run your business?
Did you not know that people were already selling model X-2011 already?
Competitive Intelligence can help fill that gap: Order model X-2011

2) Do you sell a great product but people refer to it by another name?
Are you selling “horses” and calling them “mounts”?
No one will find you; no one searches for ‘mounts’ when they are looking for a ‘horse’.
Competitive Intelligence can help you with that: Change your copy.

3) Is there an area you have not explored that your competitors have?
Are you only selling gold jewelry and your competitors thought to sell beaded jewelry? Your customers would never buy that!
They are already buying it. From your competitor! Perhaps you should stock it.

There are endless examples.
Competitive analysis can help you fill the holes in your research and get a leg up on the competition. Don’t reinvent the wheel- learn from others.