This watchtower is, like others, made to protect lightning nodes. Feel free to use.
Watchtower address: 021cf043249acc0b497c6d8f291fd6fd18deba07f3c481777631bb469c6ea86446@a6z5w3wiymr4je5py2hdvoknm26qyo4ghwmera2pod722nowou73uzid.onion:9911
Pubkey:
021cf043249acc0b497c6d8f291fd6fd18deba07f3c481777631bb469c6ea86446
Host:
a6z5w3wiymr4je5py2hdvoknm26qyo4ghwmera2pod722nowou73uzid.onion:9911

Main purpose of the watchtowers is to protect funds of other lightning nodes if node they are watching goes offline.
When your node is online, it protects itself. But when it's offline, it needs a watchtower to help protect it.
For example, when node goes offline for some time, and you have open channels, other party can put old channel state where they have more funds than you. That is a moment where whatchtowers need to react and protect your node from outdated information (channel state) and losing sats.
In order to add BullTower watchtower you can use command written below:
lncli wtclient add 021cf043249acc0b497c6d8f291fd6fd18deba07f3c481777631bb469c6ea86446@a6z5w3wiymr4je5py2hdvoknm26qyo4ghwmera2pod722nowou73uzid.onion:9911
The best strategy is to have two or more watchtowers connected to your node just in case any of them goes temporary or permanelty offline.
This watchtower can be supported here:
BTC onchain:
bc1qnjs38xwdwl6tsgxye58fgc93tcjnxgrd4thm9v
BTC lightning:
alertgrip56@walletofsatoshi.com
Or you can use QR code.