Keyword Planner is a tool that provides keyword ideas and traffic estimates to help you build a Search Network campaign.

• Search for keyword and ad groups ideas based on terms that describe your product or service, your website, or a product category related to what you're advertising. You can also enter or upload a list of keywords. And you can multiply two or more lists of keywords to create a new list that combines your keywords.
• Get historical statistics, like the number of times people have searched for a keyword or how competitive that keyword is.
• You can also get traffic estimates, like how many clicks and impressions your keywords might get for given bid and budget amounts.

More about Keyword Planner

* Nguồn: Google