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.
Implementation and control: consist in the series of activities that must be performed in order to run the marketing plan in accordance to the objectives set by the marketer. At this stage, it is critical to gain the support of all members if the organization, especially when the marketing plan is due to affect the organization from its grounds.