Download @HubSpot's 100 Ideas That Changed Marketing and discover the biggest concepts that have shaped this industry. (RT @Evgeny_Chernykh: 100 идей, кот.
Not sure I agree with A/B testing being the #1 thing that has changed marketing, but it is helpful to look across a list like this to see the sweep, the pure scope, of the changes we've taken in, are processing and hope to understand some day (lol). For many years nothing changed and then everything did and that is the way it goes sometimes :).
Via Rose Marie DeSousa