Specifically, it might teach us things about the prevalence of extromophiles, which promises to open up the universe to us.

Either we use extremophiles to establish beachheads in otherwise uninhabitable places, or we adapt ourselves or other beneficial organisms with the information we learn.

For instance proteins that protect against high or low temperatures.

Less speculatively, krill can be fed to things we already eat, and some krill survive on a diet entirely comprised of extremophiles.