Keywords selection is a major decision when you are doing search engine marketing (SEM). There are many free web tools which will help you to select keywords for your website. This is another new website that will not only show you all the related keywords (including long tail) but also how many advertisers are bidding on this keyword, how many people are searching for this keyword and how much is advertisers are paying for this keyword (on an average).

The website is called SpyFu. I have no idea what the term “SpyFu” means but they have great selection of keyword research tools for online marketers. If you are an Adsense publishers you can also get some clue which keywords will pay you more money per click (Hint. Hint.).

SpyFu is a company run by Velocityscape which is a privately held software product and services company based in Phoenix, Arizona. SpyFu is currently indexing 370,681,167 results on 1,891,375 keywords across 7,513,090 domains. All data was sourced between Apr. 25th and May 8th, 2007. Here are some key features of this free tool.

Features:

• Free keyword analysis or search engine marketing tool
• Categories or industries wise keyword differentiation
• Cost per click for the keyword
• How many advertisers are bidding on the same keyword
• How many people are searching, clicking the keyword
• How much advertisers are spending for this keyword each day
• What are the most possible related long tail keywords
• Instant Google Adwords competitors site/URL examination
• What other related keywords competitors are bidding
• Google organic results (SERP’s)
• And lastly historic data organizing option

All these features are for free but SpyFu subscribers will get many more advanced and effective keyword analysis tools inside restricted area. So, visit SpyFu, do some killer keyword research and start making money from search engine marketing.