The Google Adwords Keyword Tool is a free and very useful seo tool. Researching which keyword to target is essential and a crucial process to an effective seo as it can make or break your website. Using the right keywords will boost your site ranking, traffic, and profit.
Google Analytics is also one of the best free SEO tools that you can use together with the Google Adwords Keyword Tool. It gives you an overview of your traffic, traffic sources, referrer, market, keywords, bounce rate, etc. You are provided with detailed information which locations your visitors are from, what they are searching for, and which of your topics, your readers actually like. From here you can adjust your seo strategy accordingly to bring in more traffic to your site.