Boosting is really important on the Fediverse because it makes whatever you boost federate to the entire servers of all your followers. A boosted public post appears on your followers' timelines, but also becomes searchable to everyone on the servers of your followers.
Instead of an algorithm, the Fediverse relies on human beings sharing stuff they find interesting. This process creates a wonderful chain of discovery.
To boost something here, click the 🔁 or 🚀 button below the post.