Imagine you have a toy building block tower made up of metal blocks and glass blocks. But when you try to stack them up, they keep falling apart because they don't stick together very well.
Now, imagine you have a special kind of glass block that can turn into a stronger material called ceramic when you heat it up. When you put this glass block in between the metal blocks and heat it up, it turns into ceramic and attaches itself to the metal blocks. It's like magic!
This is how glass-ceramic-to-metal seals work in things like electrical components and medical devices. The glass-ceramic material is sandwiched between metal parts and heated up so it can bond to the metal and create a strong and reliable seal. This helps keep important things like wires and sensors in place and protect them from getting damaged.