Recommendations are personalized based on the stuff in your inventory and on your location. We match what organizations in your area need with each item. We display your items in the main recommendations screen. Swipe up to keep an item. Swipe down to give an item, once you've explored the box carousel at the bottom of the screen so see your options.
You may also select things from My Stuff and then opt to give it from the item detail page. This will display the item in the main recommendations screen and show you options.