1. Ad Blockers Usage and Demographic Statistics in 2021
https://backlinko.com/ad-blockers-users
2. Ad Blocker Trends: Who Is Using Them and Why?
https://www.searchenginejournal.com/global-ad-blocker-trends/398133/#close
3. Why Utilizing Data in Your Digital Marketing Strategy Is So Essential
https://www.forbes.com/sites/nicolemartin1/2019/10/22/why-utilizing-data-in-your-digital-marketing-strategy-is-so-essential/?sh=6afe517d5253
4. Digital Marketing: Why a Data-Driven Strategy Is Fundamental
https://www.contentintelligence.net/en/ci/digital-marketing-why-data-driven-strategy-is-fundamental