You need to know everything obtainable about your customers. This list will get you started. You will need their age, sex, marital status, income levels, education levels, geographic locations, where they shop, if they go to church, if they have kids, ages of children, political affiliation, what they like about your company, what they don't like, why they shop with you, what they value about your products/services, what they like the most/least about products/services, and whether prospects are unaware of your brand or products/services. Customers want you to know certain things about them and if you do, they will remain loyal to you as you take time to know them.
Mobile Marketing: Another most prompting way of marketing which is used in today's digital world. The acceptance of smartphones and tablets has helped to change the way companies used to target their customers earlier; these days they implement strategies that reach customers on their devices itself. From a survey via Our Mobile Planet, 89% of smartphone users notice mobile ads.