With the keyword planner, you can view several historical statistics for your keyword ideas and ad groups. You can, for example, see how many users have searched on a particular keyword. You can also view traffic estimates for keywords, such as the number of clicks that you can have for various bid and budget amount.
Once you have entered or imported your keywords ideas into the keyword planner, statistics and estimates will be presented in tabular form, allowing you to view and sort them easily. You can then use this data to select the keywords or ad groups that can help you achieve your advertising goals.
About the keyword planner search volume statistics
When you do a search of ideas for keywords and ad groups, or you decide to get historical statistics (on the search volume for example) for a list of specific keywords, a table containing search volume will display. Remember that all of these statistics are specific for the targeting parameters (geographical and networks) that you select in the “Targeting” section.
You will find below an explanation of the data presented in the various columns:
Some things to remember regarding historical statistics:
Select your keywords based on quality rather than quantity. Indeed, the most relevant keywords are likely to give you better results. Keywords associated with higher search traffic or greater competition between advertisers do not necessarily help you achieve your advertising goals.