Solo Ads vs Social Media

For years now there's been an ongoing argument between two schools of thought:

1st school of thought says Email still rules.

2nd school of thought insists that Facebook is the new king of the hood and email is on it's way out.

To settle this, I went out searching for scientific data (besides my own conversions).

I scouted the internet for months and finally came across a study that clears all confusion.