Personal information is anything that can be used to identify someone, such as a name, email address, mailing address and even an IP address.
Let's take a look at some examples.
Here's how Twitter does this:
Dark Sky is a hyperlocal weather forecasting service available on iOS and Android. For the app to work as designed, it collects data about the user's location and contact details for local weather reports.
On the home screen of the app, the user can access the Settings screen by selecting the cog in the top right hand corner:
Glympse is a mobile app which provides real-time location sharing services. It collects personal data and location details in order to improve its products.
Finally, WhatsApp is a text, voice and photo messaging app used around the world. The app is highly focused on protection of personal data and privacy, using end-to-end encryption as a security measure to stop messages being intercepted.
On your website, make sure the link to your policy is easily visible throughout your site. Placing the link in a footer menu is one of the easiest ways to do this, as your footer will be present on every page on your site.
You should also include a link to your policy in sign-up or registration forms at the time when you're asking users to provide you with personal information.