The "Map illustration" refers to the map itself.
The "search functionality" refers to the search bar at the top of the app.
"Plan" means the personal plan you can set up in the app.
"Offers" means offers available on the homepage of the app.
"Talks" are the daily talks which happen at the Zoo and can be found under the Talks menu item at the bottom of the app.
"Navigation" means finding your way to a place on the map.