Tootdon has a search server, which indexes the public toots of the federated timeline for searching. You can search the latest toots for 30 days, and those older than 30 days will be automatically deleted from the server. Also, when posting from the application, in the case of public toot, we also update the index of the search server. If you do not want to be indexed, we will exclude that account if you request @tootdon from your account.