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US Online Ad Spending Will Grow By 70% From 2017 To 2021
November 28, 2017

Forrester’s updated online advertising forecast predicts that US spending on online display and social media advertising will grow by nearly 70% between 2017 and 2021. According to Forrester Data, the rapid expansion of social advertising will drive this growth, with spending almost doubling over the next five years. Also, mobile ads will be the main factor keeping online display investments afloat.

Here are some additional key findings from the research:

  • Amazon’s ad businesses will continue to steal market share from industry leaders Google and Facebook with an expected ad revenue of more than $2.5 billion in 2021.
  • Mobile advertising — with a focus on in-app video ads — will double over the next five years, which will make up the majority of the industry’s online display ad investments.
  • Also driven by mobile, social media ad spending will reach $40 billion by 2021, increasing competition with online display ads, which will start emulating social ad models in order to compete.

Click here for more information, and please contact us if you'd like a copy of this report.

About Forrester

Forrester (Nasdaq: FORR) is one of the most influential research and advisory firms in the world. We work with business and technology leaders to develop customer-obsessed strategies that drive growth. Forrester’s unique insights are grounded in annual surveys of more than 500,000 consumers and business leaders worldwide, rigorous and objective methodologies, and the shared wisdom of our most innovative clients. Through proprietary research, data, custom consulting, exclusive executive peer groups, and events, the Forrester experience is about a singular and powerful purpose: to challenge the thinking of our clients to help them lead change in their organizations.


Jenna Vassallo
Marketing Manager
Forrester Research, Inc.

Tel. 617-613-5746



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