Conqueros are peole who go to other lands in search of weath in general, people who pays any price to have hat they want, they can even kill to get there. They also wanted to impose their feith and religion.
On the contrary explorers are the type of people who look for knowledge.
Immunityis something, like a right a person gets, it gives the person some protection or freedon to do something.
A conquistador is a Spanish explorer, like the ones that explored America. They were important since the Spanish would not have spread their empire without someone to lead the way.
An immunity is something that means you cannot get harmed by since you have already had it or have medication to make yourself invincible to that disease. It's like after having chicken pox, you can't get again.
I hope that this is the answer that you were looking for and it has helped you.
