Keyword analysis
Keyword Manager can analyze keywords to provide valuable competition information. This can help to identify keywords that have a large number of searches, but are not heavily targeted by other websites or ads.
To view the competitor data for keywords, highlight the keywords by holding down the control or shift key and clicking on the keywords to select. Then click the Analyze button.

Refresh search volume (KeywordDiscovery)
Refreshes the number of Keyword Discovery global premium database searches for the selected keyword(s).
Google advertisers
Displays the number of Google advertisers for the selected keyword(s).
Yahoo advertisers
Displays the number of Yahoo advertisers for the selected keyword(s).
MIVA advertisers
Displays the number of MIVA advertisers for the selected keyword(s).
Top MIVA bids
Displays the top MIVA bids for the selected keyword(s).
Keyword competitiveness
The number of Google pages in which the search term appears.
Keyword competitiveness (inanchor)
The number of times the keyword appears in linking text on Google.
Keyword competitiveness (intitle)
The number of times the keyword appears in page titles on Google.
The competitor data is displayed next to the keyword(s).
Note: If you are using a Google API key (recommended) the keyword competitiveness results may differ, compared with non API results. We believe that the Google API employs data filtering to remove duplicate content and content in different languages. As a result we believe that this provides a more accurate indication of a keyword's competition.
Note that the actual number of results shown on the Google website, does not represent the number of results that Google deems to be unique and relevant.
For example, a Google website search for "platinum diamond wedding bands " (including quotes to perform an exact phrase match) shows 22,400 results. A check of the very last Google result page, shows the following text: "In order to show you the most relevant results, we have omitted some entries very similar to the 71 already displayed. If you like, you can repeat the search with the omitted results included."
So Google perceive only 71 results of the 22,400 to be unique and relevant. (The exact figure may change slightly depending on which Google data center your query is directed to)
Therefore the Google API figure may seem very low in contrast with the total number of results shown on the Google website, but when compared to the actual number of results that are deemed as unique and relevant, the Occurrences figure is a realistic representation of the relevant and unique occurrences of the keyword in question.
