Another meaning of the verb is 'To address a crowd' or to speak to a collective of people. It can also be used as a noun in this mode 'The president gave his address to the parliament at 6pm'. He addressed the crowd with great enthusiasm, talking about matters relating to education and welfare reform.

It means to 'deal with' - usually a problem. "We have to address the issue of climate change urgently." "We have to address your continued lateness to class." "He needs to address his drinking problem, so I think he should go to rehab."

"To address" in this context means "to deal with, to talk about, to bring up in discussion". It doesn't mean "to confirm". It also has another meaning: "to put an address on a letter". I have to address this letter to my friend. = I have to put my friend's address on this letter.