What is the method to explore Digital Marketing strategy in the year 2015?

mobile applications data tracking features such that it collects information from the phone book of each individual and send the app or advertisement to the other people.

Your digital marketing strategy in2015 should focus around the following:

1) Mobile First (apps and mobile ads)

2) Big data analysis and management for customer retention.

3) Aggressive gorilla marketing tactics backed with online engagement metrics

4) Business employee lives shared with the consumers and customers to increase brand awareness, culture and beliefs.