Does doing good mean being good?

I have always been intrigued by what makes one classed as 'good' and who determines the definition of 'good'?

I am not talking about self righteous people who take the superior moral high ground and judge everyone who does not live up to their standards while they secretly live a deplorable life.

I mean those involved in 'doing good' such as those involved in charity work, active on social media showing the many 'good' deeds they do in poor communities and to those in need.

Does being altruistic make one a 'good person'?

Does 'doing good' help in living a 'good life' (whatever is considered a good life)?

If we are all 'good and do good' could we make this world a better place?

There is a book that I am reading now that raises these questions.