Джерела:
- https://www.campaignmonitor.com/resources/guides/email-marketing-benchmarks
- https://www.getresponse.com/resources/reports/email-marketing-benchmarks#email-opens-over-time
- https://www.campaignmonitor.com/company/annual-report/
- https://blog.hubspot.com/sales/subject-line-stats-open-rates-slideshare
- https://www.marketingdive.com/news/study-personalized-email-subject-lines-increase-open-rates-by-50/504714/
- https://www.statista.com/statistics/255080/number-of-e-mail-users-worldwide/
- https://www.abtasty.com/blog/video-email/https://www.emailmonday.com/mobile-email-usage-statistics/
- https://www.outreach.io/blog/will-emojis-increase-reply-rates
- https://kinsta.com/blog/email-marketing-statistics/