Executive sponsor
An executive sponsor is the senior leader who backs a specific goal with attention, air cover and the authority to unblock it. The role is not oversight or approval. It is removing the obstacles a team cannot remove itself, and whether the sponsor turns up is the clearest signal your company sends about which goals are real.

What the role is not
It is not reviewing a slide once a month and asking how it is going. That is attendance, and teams can tell the difference immediately.
It is also not doing the work, or second-guessing the team’s approach. A sponsor who starts redesigning the plan has quietly removed the ownership that made the goal worth setting.
What the role is
Three things. Clearing obstacles the team has no authority to clear, usually other parts of the business. Defending the team’s focus when somebody senior wants to add something. And absorbing the political cost when the goal is genuinely a bet and the bet does not come off.
That last one is the whole job. If the sponsor disappears the moment confidence drops, everyone learns that the honest confidence report is the dangerous one, and you will never get another.
The signal it sends
People read attention, not statements. A goal with a sponsor who shows up is important. A goal with a sponsor who cancels is not, whatever the strategy deck says.
Which means the number of goals you can meaningfully sponsor is a hard limit on the number of goals you should set. If nobody senior has time to back it, you have already answered the question of whether it is a priority.
What does an executive sponsor do for an OKR? +
Clears obstacles the team cannot clear itself, protects the team’s focus from additions, and carries the political cost when a genuine bet does not come off. Not oversight, not approval.
Does every OKR need an executive sponsor? +
Every OKR that genuinely matters does, and the number of goals a leadership team can actually sponsor is a useful hard limit on how many goals to set.