Dynamically update promotions

If you want to customize a promotion link in response to a user query, you can add $q to your promotion URL and/or your promotion title. For example, say you have a site where users can look up postal codes. Add $q to your promotion URL, like this:

http://www.example.com/postalcodes/$q

Next, add $q to your promotion title, like this:

Postal Code Lookup: $q

Now, if the user searches for 98102, Custom Search will replace $q with the user's query, and display the promotion URL like this:

http://www.example.com/postalcodes/98102

The title will be displayed as:

Postal Code Lookup: 98102

You can use $q for both regular expression and non-regular expression promotions.