Google has put together a one-minute guide to using its Search-based Keyword tool. The tool was launched just over a year ago in beta. It lets paid search advertisers 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,” says Dan Friedman of Google’s Inside AdWords Crew. “This means that by including all keywords that are relevant to your product or service in your campaigns, you can ensure you can ensure that you will reach a greater set of potential customers. To help you do this, you can use the Search-based Keyword Tool to quickly identify relevant keywords which aren’t yet included in your AdWords campaigns.”

Earlier this year, Google made some improvements to the search-based keyword tool. The company not only expanded the reach to Australia, Canada, China, Japan, and New Zealand in addition to the US and the UK, but users can also now select the currency they’d like to see suggested bids in on the setting page.

Google also added some customization features to the tool this year that could lead to more targeted results for users. These include language/country-specific results and ad/search share filters.