If used wisely, there are a number of free keyword tools out there that you can utilize to help find either new niches to target, or new PPC terms that have a high search volume but a low level of competition from other advertisers (marketing nirvana!).
Below I’ve put together a list of 7 free keyword research tools that will make the world of difference to your efforts. I hope you find them useful.
The Google Adwords Keyword Tool gives you approximate keyword search volume statistics for Google search network and because of Google growing and dominating search network, you really can get pretty precise results.
With Google Insights for Search, you can compare search volume patterns across specific regions, categories, time frames and properties.
With Google Trends you can compare the search popularity of multiple terms across a defined period of time.
The SEO Book Keyword Suggestion Tool offers a number of worthwhile functions:
KGen Keyword Generator is a Firefox extension that allows you to see what keywords are strong on the web page you are visiting.
I hope you find these tools useful – I’ll update this page as and when I find more!