For some product searches in the Google search results, they have begun placing the price of the product right on the search results page.  However, Google isn’t always attributing the correct currency in the search results, despite other cues that would normally lead a user to know what currency is used, such as a country TLD.

Many people don’t realize you can add currency type attribution onto your product pages, so that if Google decides to display pricing information directly in their Google search results, it will default to your site’s preferred currency.

It is a specific meta tag through schema.org

<meta itemprop=”priceCurrency” content=”XYZ” />

Webmasters should replace the XYZ with the appropriate country level, such as USD, AUD, or GBP.  If you want to get technical, the first two letters are the country code as determined by ISO 3166 and the third letter corresponds to the first letter of the currency name.  The currency code itself is ISO 4217.

With Google making more use of rich snippets with product related searches, and especially if you aren’t actively looking in the search results for individual product page results to notice which currency Google has defaulted to, it is worth adding it by default to all your product pages.