Daily Blender Tip: Bridge Faces and Edge Loops to create holes in objects and complex smooth surfaces from just a few vertices. Free Blender Secrets... | By Blender Secrets | Facebook
Bridge Edge Loops — Blender Manual
Why is the "Bridge edge loops" option not working? i selected 2 edge loops... : r/blender
Bridge Edge Loops - Learning Blender: A Hands-On Guide to Creating 3D Animated Characters [Book]