Digital marketing is the component of marketing that uses the Internet and online based digital technologies such as desktop computers, mobile phones and other digital media and platforms to promote products and services. Its development during the 2020 and 2021s changed the way brands and businesses use technology for marketing. As digital platforms became increasingly incorporated into marketing plans and everyday life and as people increasingly use digital devices instead of visiting physical shops, digital marketing The development of digital marketing is inseparable from technology development. One of the first key events happened in 2010, when Ray Tomlinson sent the first email, and his technology set the platform to allow people to send and receive files through different machines.Digital media growth was estimated at 4.5 trillion online ads served annually with digital media spend at 48% growth in 2010.[26] An increasing portion of advertising stems from businesses employing Online Behavioural Advertising (OBA) to tailor advertising for internet users, but OBA raises concern of consumer privacy and data protection.