Google has posted this one-minute guide to using its Search-based Keyword tool.

The tool was launched just over a year ago in beta. It allows paid search advertisers to see what keywords they may be missing out on based on searches on their site.

Millions of people use Google each day to find products and services by searching on various keywords and by marketers including all keywords that are relevant to the brand or product in their campaigns, they can ensure they are reaching a wider range of potential customers.

To help marketers do this, they can use the search engine’s Search-based Keyword Tool to quickly identify relevant keywords which aren’t yet included in your AdWords campaigns – here’s how it works: