I'm a noob with assembly, I understand some things, but it's still very convoluted and difficult to me at the moment.

There's a binary that I'm trying to look at in GDB but there is a section of the code that for the life of me I can't figure out what it's doing. I have an idea of what it might be doing, but I don't know for sure.

The part that's throwing me off is:

Dump of assembler code for function main:
   0x08048647 < 0>:     lea    0x4(%esp),