How can a woman engage in da’wah outside the home?

A woman can do da’wah inside her home, with her husband and mahrams, men and women alike. She can also do da’wah outside the home, to other women, so long as this does not involve travelling without her husband or mahram, and there is no fear of fitnah (temptation), and this is done with the husband’s permission if she is married and there is a need for that, and this does not lead to her neglecting her primary duties, which are towards her own family.