With Unbounce, you can easily pre-fill your form fields with URL parameters (also known as query parameters).
What's a URL parameter you ask?
Well, among other things, a URL parameter is a way to pass data in a link to a web page. You can use URL parameters to track different metrics in services like Google Analytics or in this case, to pre-fill your form.
A URL parameter has two parts. A variable name and a value. In example below, "coupon" is the variable name and "50_2013" is the value:
Try it out!
Let's say you want to pre-fill a coupon code on your form. Great.
Using the example above, you'd just need to add a "coupon" field to your form and it would automatically pre-fill with the matching query parameter. Like this:
A popular use-case for this is when you're using google's UTM tracking...
Google has a popular URL building tool for tagging your links with useful data (which also happens automatically if your Google ADwords and Google Analytics accounts are linked). This will result in some paramaters being tacked onto the end of your Unbounce page URL which might look like this: