1. Brings outside knowledge and new perspectives
One of the most detrimental aspects of having your marketing team entirely internal is that it’s very easy to fall victim to groupthink. For those of you who don’t know, groupthink is when the individuals in your team (or group) begin to put aside their own opinions and adopt the beliefs of the group. This can be harmful because you need different perspectives to simulate the different opinions of your target audience. Don’t fall victim to groupthink; grab some outside perspectives.