The bss segment is like a special drawer in your desk where you put things that you need for later but haven't actually used yet. It's a space in the computer's memory that is set aside for storing variables that have been declared but not given specific values yet.
So let's say you have a program that needs to keep track of the number of apples that it has. You might say, "Hey computer, make a special spot in your memory for an apple count variable, but don't give it a value yet because we haven't counted any apples." That variable would go into the bss segment until the program actually needs to use it.
Once your program starts counting apples, it will change the value of that variable and move it to a different part of the memory called the data segment. But until then, the bss segment is where it hangs out, waiting for its moment to shine. Think of it like an apple-bucket without any apples in it yet - it's there, ready and waiting for when the apples finally arrive.