Phrase: Selecting this setting shows keywords containing your main keyword.

Related: This setting will expand your search to reveal additional keywords that are directly related to your main keyword. Sometimes referred to as 'Suggested Keywords'.

Use as Primary: Select your primary keyword by clicking on the check box in the column to the left of it. Then click on the 'Use as Primary' button. This will move the data to the 'Analysis' tab, where you are then able to analyze your on-page SEO for your main keyword.

Use as Secondary: The same process as with the primary applies here except here you are choosing the secondary keyword. Find your secondary keyword and click on the check box and then the button 'Use as Secondary'. Again the data will be moved to the analysis tab where you can then analyze your on-page SEO for this keyword.

Add keywords to editor: This button allows you to add the keywords directly to your editor. Select the keywords that you wish to add by clicking on the check box to the left of the keyword. Once selected you then click on the button and these words will be added. It is then important to use them naturally throughout your article.

• Keyword: This column will show the keywords related to your initial root keyword found by the tool.
• Volume: This column reflects how many times per month that particular keywords is searched by people on line.
• CPC: Cost Per Click refers to the actual price Google Adwords advertisers pay for each click in their pay-per-click (PPC) marketing campaigns.
• Comp: This metric shows how competitive a keyword is. This competition does not relate to the organic search results in Google but its related to the number of advertisers bidding for that keyword in Google Adwords. The level of difficulty for a keyword is measured from 0 to 1. Therefore a keyword with a 0.50 level has a medium level of difficulty.
• No. Results: It shows the number of websites competing for a keyword in Google's organic search results.  
• Trends: This graph will show you search trends for that keyword over a 12 month period. Useful for identifying keywords with large seasonal fluctuations or if a keyword is becoming more or less popular over time.
• KEI: The keyword effectiveness index is one of the fastest ways to find keywords which are likely to help your site attract more traffic. The KEI compares the volume of searches for a keyword with the number of search results to identify which keywords are most effective for your article. The higher the KEI, the more popular your keywords are, and the less competition they have.