In Lesson 5, Jeremy talks about how he converted user and movie IDs to one hot encoded vectors and then multiplied it with the weight matrices.

I just missed the point of this. The one hot encoded matrix is just an identity matrix right? Multiplying it with the weight matrix just gives you the weight matrix again. What was the point of that?

And what is an embedding? Is it the action of looking up the weight matrix ( i.e is it a verb?)

Things have been going great and I’ve been able to wrap my mind around everything until now, but I’m unable to get the point of this whole exercise and I’ve watched it a few times.

Some help would be great! Thank You!