So, what is check-in baggage, exactly? In a nutshell, it's luggage that you surrender to the airline before your flight, and they store it in the hold of the plane. This is different from carry-on baggage, which you get to keep with you in the cabin.
Now, you might be wondering why anyone would want to check in their bags in the first place. Isn't it easier just to carry everything on? Well, think about it like this: if you're going on a long trip, or you have a lot of gear to haul, check-in baggage can be a total lifesaver. You can just dump all your heavy stuff at the check-in counter, and voila - you're free to roam the airport without being weighed down.
But what's the process like, exactly? How do you check in your bags, and what happens to them after that? It's actually pretty straightforward: you show up at the airport, go to the designated check-in area, and hand over your bags to the airline staff. They'll weigh them, label them, and send them off to the plane - easy peasy!
Check In Baggage Dimensions at Stefanie Norton blog