Keyword tools assist with search engine optimization by displaying the number of searches conducted for a given word or phrase. They are often used to optimize content for the best search engine advertising revenue by showing which keywords will generate the most revenue for each ad click. Most keyword tools also provide a number of related keyword phrases that can help with LSI as well as with finding the new keywords that can be used for the topic.
There are many keyword tools that require the purchase of software or a paid monthly subscription However, there are several useful free keyword tools that give detailed information about each keyword as well as providing 100 or more related keyword phrases.
Google Adwords Keyword Tool
The AdWords keyword tool is one of the most popular of the free keyword tools because it displays detailed information about searches conducted on Google as well as the high cost per click amounts for those terms. Many people use the AdWords keyword tool for Search Engine Optimization as well as to choose the keywords that will generate the highest revenue from AdSense. The Google AdWords keyword tool also shows the amount of competition that each related keyword phrase has.
Spacky
Spacky is a free keyword tool that displays the keyword search results for three different search engines. The results are categorized into the search engine numbers for Google, Yahoo and MSN. This keyword tool also provides related keyword phrases and the results for those phrases. This tool is helpful for those targeting their search engine optimization to Yahoo or MSN search results.
WordPot
The WordPot keyword tool includes search results from many different search engines that are all combined into one result. WordPot presents related keyword and displays two results for each phrase. The "Exact Daily" number is the number of results each day for the exact term that was searched. The "Total Daily" number is the number of searches done that contain the keyword phrase in a larger phrase.
Keyword Discovery
The Keyword Discovery keyword tool is a keyword compiler that includes keyword searches on several different search engines. The tool does not separate the results by the search engine they came from. It includes non-English related keyword phrases in the related keyword phrase results.
Wordtracker
WordTracker is available as both a free keyword tool and as a paid version. The free keyword research tool provides up to 100 related phrases. The search has an optional filter to either remove offensive words and phrases or to provide only adult results. The WordTracker results come from the Metacrawler and Dogpile metacrawlers.
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