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-Radarr User's Guide
+## Introduction
+Radarr is a movie download automation tool that ties together your movie collection, indexers, trackers as well as your usenet and torrent download client. It supports a wide variety of newznab usenet indexers, a number of torrent trackers, a handful of usenet download clients and a couple handfuls of torrent download clients. You can greatly expand the number of supported torrent trackers with [jackett](https://github.com/Jackett/Jackett/releases), a tracker to torznab proxy.
+
+## How Radarr Works
+One of the most misunderstood mechanisms of Radarr is how it finds movies to add to your collection. It seems obvious to most new users, it searches for them. And if it isn't found then, it'll search later for them. Right? But this is not how it works. If you think about it, that sort of mechanism does not scale at all. If you search every day and have 10 missing movies, that is 10 searches. If you have 100 missing movies, that is 100 searches. If you have 1000 missing movies, 1000 searches. Every day.
+
+Instead, Radarr does an "RSS" sync every 15-60 minutes which queries your indexers and trackers for newly posted content. *Most* of the time, this means new releases... but with usenet, where reposts are more common, this can be older content. It isn't as common with torrents, but it does happen occasionally. So a movie added to Radarr may never download if it never shows up as newly posted content on your tracker or indexer. So how can this be feasible?
+
+When you're adding a movie you know can already be downloaded, you'll  pick the right profile, root folder and monitor status... you'll check the "Start search for missing movie" box and then add the movie. This will add the movie and initiate a search, which covers the past and the present. That let's "RSS" cover the future.
+
+![Start search for missing movie](https://i.imgur.com/rP7URXx.png)
+
+And the best part of "RSS" is that it is *actually* a search, but without any query parameters besides your indexer/tracker categories.
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