There is a common misconception that the SEO keywords associated with a particular niche which happen to be more expensive, must therefore be more desirable and lucrative. That maybe true, however....that does not mean that they will provide you with a maximum return on your investment, or optimal results in the long term.
The problem with the higher tier keywords is that by virtue of their high cost, this means that the website owner will have to contend with paying more money for their usage both for the initial usage of the words as well as their continued use. If you have a limited budget you will probably find that you end up burning through your budget well before you are actually able to make any sort of solid head way when it comes to carving a head start over the competition.
There are a number of different keyword optimization tools available, some which are free to download and use with no further recourse, and others which have a fee attached to them.
Make sure that your choice of keyword actually has a resonance with the people who will be most likely to use your website. If you operate a website that caters for medical supplies for dogs, then you may get better results substituting the word “dog” for “canine” (this is because canine is the more academic and technical usage of the word.)
Never underestimate or overlook the value and significance of spelling typos and mistakes! When people are searching for something on the internet, the chances are that they are doing so whilst under some degree of pressure with time being a constraint that they have to keep a firm eye on. Some words are also very easy to misspell because they are spelt differently from how they happen to be pronounced. By including the most common variations of spelling mistakes for a particular keyword or phrase, you will also be able to scoop up another large portion of the available traffic.