The phrase "boil down to something" means to reduce or simplify a situation, problem, or explanation to its most basic, essential, or fundamental element. It refers to the core or main point that everything else depends on or can be summarized as. In daily usage, it often means identifying the root cause or the key factor behind a complex issue.
It is used when simplifying or summarizing information or to express what something ultimately depends on.
For example:
The success of the project boils down to good communication among the team.
After all the arguments, it really boils down to whether you want to go or not.
The decision will boil down to cost and convenience.
