Features: 1) Transmitted in the same format as informational posts > Minimized ad recognition 2) Accurate targeting with user ID 3) Can be extended to similar targets to data collection Advantages: 1) Accurate personal user-based targeting is possible, making it effective to attract potential customers 2) Advertising performance can be managed and improved according to targeting & contents. 3) Facebook user prospect data can be obtained and utilized 4) Has high monthly active users and daily active users. Disadvantages: 1) Distribution chart of users in their 10s and 20s concentrated 2) Average CPM charging cost increased due to intensifying competition during advertising week and leaving active users compared to the past