they upgrade your ship to a reasonable level,
in a nut shell -->
You need to unlock the engineers with materials often only available at 4 a time requiring 10-20 round trips or sitting watching netflix for the quota to refill, or by selling data, travelling distances gaining combat rank etc, stations / engineers bases are often 6kls+ away from the star for extra fun!!!!! YAY
then when they're unlocked you need to find hens teeth, eye of newt serum and other obscure unobtainable RNG stuff or trade it all as a soul destroying rate to upgrade your stuff, especially grade 5 clicking many times sapping away your materials you spent hours /days gathering.
if you're into PVP you better rinse and repeat the engineering cycle every patch as the meta changes.
then after 30 hours of playing and upgrading your ship you can actually do the thing you came onto ED to do.