Okay, so you know when you pick up leaves or flowers and put them in a scrapbook to show your friends and family? Scientists do that too but with lots of different plants from different places, and they put them in big books called herbaria. But these books are very old and delicate, and some of them have been damaged over time because they were not kept in the right place or taken care of properly.
So, people who love and care about these books and plants try to fix the damage and make sure that the plants are in good condition. This is called conservation and restoration. They use special tools and materials to fix the pages and the plants, and then they put them in special boxes or cabinets to keep them safe.
The hope is that these books will last a very long time so that people in the future can also learn about the plants and how they grew, even if they don't exist anymore.