As we move through the web, we all leave behind a very distinctive digital footprint. Every time you visit a site or open an app, you might be handing over information about who you are, where you are, where you’ve been and much, much more.

There’s lots to potentially learn about you, and there are many companies interested in collecting all of it. It won’t always be apparent that data about you is being collected, but it’s important to consider who’s collecting your data and why. On top of that, how are they keeping your data safe? We spoke with Mozilla’s Alice Munyua about this very topic.

Want to get smarter about protecting your data? Here are some tips we collected from five folks who live and breathe privacy and security.