What is Resnet?

I don’t know whether i skipped somewhere, but the word Resnet is bothering me. Can anyone briefly explain me what resnet is.

You should go back and watch lesson 7 again, where you build one from scratch. Here is the notebook:

But the basic gist is a ResNet is built by ResBlock’s which are essentially two ConvLayers with an offset (the original x) plus another ConvLayer at the end

I guess i am too early. I just completed 1st lesson and i was going through notes.