You can ask the viewers of your Presentation to fill in information about themselves. This is typically used in relation to Questionnaires and subsequent Statistics. In addition to the 4 fixed ones such as Name, Company, Email and Birthday, you can create up to 5 more yourself. If you wish to provide anonymity, you can simply omit these.
The user then hav to fill out the form before continuing
In the Statistics module you will be able to see the data, when hovering over the ( ! ) icon
See also