Confused on modifications

I have a new gaggia classic pro E24. I love the machine, it looks great (green model) and works great too.

I’m still learning espresso and my grinder is sub par (DF54) and causes me problems so almost everything “off” is purely my technique.

But the times I pull a perfect shot are addicting, it’s been better than any espresso I’ve had at local coffee shops maybe besides a couple, and I live in an international city with lots of $5 espresso shots

Something’s though are a bit challenging, like the steam wand. It’s just never had enough power until I learned how to purge it early and temp surf it.

This had me wondering after looking at all mods, is there a mod for that? There seems to be a ton like the gaggiano, can someone explain the common mods, what they’re for, etc?