Season 5 is now live for Sea of Thieves players and brings with it the new treasure burying option among other fun things such as rowboats equipped with cannons and helpful rats on ships.
With the season, you are now able to put your shovels to use by burying treasure rather than unearthing it. After you bury it, you can make a map and either hold on to it or pin it to the Quest Board for others to find. Doing the latter will earn you both reputation and bonus Renown.
Be aware though that if you put Map Bundles on the Captain’s Table they can be stolen by other pirates should they sneak aboard your ship. Also, when a ship sinks, Map Bundles will float to the surface like any other item to be collected.