In recent years, CRM marketing strategy on smart phone tends to be increased in popularity. According to the research about how people use digital technology and internet conducted in 2019, found that 69.24 million of Thais use internet everyday, while 57 million of them can access internet, and 55 million people always use internet via their smartphone. As such, it can be assumed that the majority of Thais is able to access the internet and often use social media via their mobile phone.