It is possible to delegate your voting power (some or all of it) to others within the Gyroscope governance system. Voting power can be delegated to any address.
Why would you want to do this? Well, like politicians are elected to take care of the day-to-day running of a political system, DAO participants can 'elect' someone else to take decisions for the DAO on their behalf.
This means you don't have to get directly involved in every decision taken by the DAO, but instead can be indirectly represented. The major advantage of this is saving time: keeping up with all DAO discussions takes a significant amount of time. Instead, you can delegate your voting power to someone else to vote on your behalf.
DAO Delegates are individuals who have been nominated, whether by themselves or by others, to represent others. You can see the current DAO delegates here. You can choose to delegate your voting power to a delegate who you think will represent your interests best.