From the transcript of Ivanka's speech at the RNC:

(APPLAUSE)
Women represent 46 percent of the total U.S. labor force, and 40 percent of American households have female primary breadwinners. In 2014, women made 83 cents for every dollar made by a man. Single women without children earn 94 cents for each dollar earned by a man, whereas married mothers made only 77 cents. As researchers have noted, gender is no longer the factor creating the greatest wage discrepancy in this country, motherhood is. As President, my father will change the labor laws that were put into place at a time when women were not a significant portion of the workforce. And he will focus on making quality childcare affordable and accessible for all.
(APPLAUSE)
As a mother myself, of three young children, I know how hard it is to work while raising a family. And I also know that I'm far more fortunate than most. American families need relief. Policies that allow women with children to thrive should not be novelties, they should be the norm. Politicians talk about wage equality, but my father has made it a practice at his company throughout his entire career.
(APPLAUSE)
He will fight for equal pay for equal work, and I will fight for this too, right along side of him.

It sounds like she's influencing Trump so he'll take action on the issues she cares about most. I'm not an expert on Ivanka myself, so I'll just take Chelsea Clinton at her word when she claims Ivanka is a good person and friend, especially after such a nasty campaign.