You need to figure out certain things, before starting to speak to people.
Firstly, before starting to speak to people, you need to figure out what their interests are. You are likely to have an easier time speaking to people about something they are truly interested in.
Secondly, before starting to speak to people, you need to figure out if they have basic knowledge about what you will be addressing them on. It wouldn’t make sense, for instance, to start speaking to people about the Money card described at www.walmartmoneycard.com, or even about the Walmart money card sticker activation if, in the first place, they have no knowledge on the basic concept of direct deposit. A better idea would be, perhaps, to start them off with a discussion about the concept of direct deposit, then gradually introduce them to the idea of a Walmart money card account, before proceeding to tell them about the card itself.
Thirdly, before starting to speak to people, you need to figure out what their attitude to you is like. If, for instance, the people respect you, or if the people at least like you, you will find it easier to persuade them than would be the case if they didn’t respect you or if they disliked you.