Session regeneration is an often overlooked – but fairly important – concept.
More than half the time (according to Rejoiner data), customers will consume your cart abandonment emails on a different device than where the first touch occurred.
If you are not restoring their previous shopping session regardless of their device, you are losing money.
This article by gives you an introduction to Session Regeneration, and goes over a few campaigns, using real numbers. It’s worth a read.