NEW YORK: Communications leaders from Walmart and MasterCard highlighted how engagement has become a central force propelling their outreach efforts in the "Power Shift" session at PRWeek's Power to the People Conference on Wednesday.

Mona Williams, VP of corporate communications at Walmart, described how Hurricane Katrina was the impetus for the global retail giant's focus on the community. Spearheaded by then-CEO Lee Scott, Walmart decided it needed to help the people devastated by the disaster.

“It was an eye-opening moment,” ...