A lot of people think that grabbing attention is just in the subject line, but this is far from true. The human attention span is 8 seconds, meaning you have to rehook the viewer almost constantly! A lot of email marketers like to obsess over open rate, but if the people that open your email aren’t reading it and finding value and/or buying your product, open rate means nothing! You have to grab attention, and you have to keep that attention till the very end.