I like this Video on OKR (Objectives and Key Results) because it explains: Alignment of people on inspiring objectives How big companies are using the OKR The quarter...
Playlist - OKR - 3 Videos To Understand
Here a very good summary of the book that explains
what is the OKR (Objectives and Key Results).
Here the book:
This is a very good video with an explanation of what is OKR by examples.
Worth to see.