In Mount and Blade II: Bannerlord something that the developers have worked on and made a lot deeper is the Settlement system. In Mount and Blade Warband owning a settlement could be a bit of a hindrance.
You would constantly see updates about your settlement being raided and if you were too far away there was nothing you could do about it. Upgrades also took a while and the amount of money you got from them made players question if they were even worth having.
Luckily TaleWorlds Entertainment made a few adjustments in the sequel that make them a lot better to handle and way more valuable to have.
Getting A Settlement

There are a few different methods for acquiring a settlement in Bannerlord. The first way is the most straight forward, just take one through brute force. To do this you’re going to need to be at war with a faction.
Then you’re going to need to attack a castle or town of the faction that you are at war with. I’d recommend starting with castles, as they will have less of a garrison to defend them. Be careful when sieging as even less defended castles are still going to need some skill and a strong army to take. Once you’ve captured a castle or town, any settlements under that castle or town’s control are now yours.
You can also receive a settlement from your lord if you are a vassal if they choose to offer you one.