Researching keywords is an important activity for website owners and bloggers alike. Often times, however, people are not sure about what tools to use. Below you will find a list with my favorite resources for this purpose.
1. SEO Book Keyword Suggestion Tool
This is tool uses the Overture (Yahoo! Search Marketing engine) to produce estimations of monthly search volume.
Basically it gets the number of monthly searches reported by Yahoo! and divides it by two to find the MSN results and multiply it by two to find the Google results. It is a versatile tool because apart from the estimated search volume, it also brings links to several other tools and queries.
2. Google Trends
Google Trends allows you to compare the traffic levels of search queries along the time. You can insert up to five search queries, and the results can be filtered by region and time span.
This tool is particularly useful when you are working with a limited number of keywords or terms, and when you need to see the evolution of the traffic related to each of these keywords.
Wordtracker is a paid service ($300 yearly or $30 weekly), but it comes with a free trial tool which can be used after registering on their website.
The advantage of Wordtracker is that come with extra featured, including a keyword thesaurus and lateral search terms. You can use this tool, therefore, when you are not completely sure about the keywords you will be targeting.
If you want a more complete coverage about the many keyword research tools available on the Internet you can read a post on SEO Book titled “SEO & PPC Competitive Analysis & Keyword Research Tools.”