Conversion Tracking is easy if you remember to understand
keywords, ads, ad groups and campaigns. You want to know your Return on
investment in order to make good decisions about spending money. You can see
who is viewing your site and view cross-device, cross browser, and other conversion
data in your "All-conversions column
Here is the process for tracking:
You add a conversion tracking tag, or code snippet, to your
website or mobile app code. When a customer clicks on your ad from Google
Search or selected Google Display Network sites, a temporary cookie is placed
on their computer or mobile device. When they complete the action you defined,
our system recognizes the cookie (through the code snippet you added), and we
record a conversion.
Some kinds of conversion tracking don’t require a tag. For
example, to track phone calls from call extensions or call-only ads, you use a
Google forwarding number to track when the call came from one of your ads, and
to track details like call duration, call start and end time, and caller area
code. Also, app downloads from Google Play will automatically be recorded as
conversions, and no tracking code is needed.