Meaning
The flag of Canada: a red band on each side framing a white centre square with a large red maple leaf. The leaf is the part everyone recognises, so the emoji reads as Canada even at tiny sizes.
People use it for trips to Toronto or Vancouver, ice hockey nights, maple syrup posts, Canada Day greetings and Canadian nationality in bios, often next to 🍁 or 🏒. “Landed in Montreal, poutine comes first 🇨🇦🍁”