Hey @priyankagupta20, there are quite a few ways you can track PDF downloads. But let's go through the items you called out. As a note, there are three types of links that can be captured in Adobe, "Exit", "Download" & "Custom". When you use Download, it sets OOTB metrics related to link details outside of the numbered events & custom dimensions.
- When you enable it by default in the Adobe Analytics extension in Launch, it is using the "download" link tracking, and is defined by the extension types you set-up and other configuration options. It will use the OOTB metrics for link downloads & link name value.
- Event1 could be set for anything, including download links. You will then capture download events inside event1. This in theory will be equivalent to the download OOTB metric. But you could use this if there was a desire to count "download pdf" differently then "download .doc". That is entirely based on your measurement.
- Custom links are pretty much utilized for any link track that isn't an exit or download link, or page-load. This can include clicks on toggles, navigation links that take you to another section of the site, clicks on pop-ups, etc. Most implementations I see have this link type utilized the most heavily.
The flexibility can be overwhelming at times, but basically, you can use both to capture download links! The question becomes, what are you trying to measure, and that will help you answer better how you will capture. Is there a desire to understand what types of files users are downloading at an occurrence level? Or is just knowing a user is "downloading" a file? If the former, custom events can be helpful to distinguish.
Thanks,
Andy