Mox Claimed 

It has been another year (and a half) since the last publication of the Local Search Ranking Factors, and local search continues to see significant growth and change. Why spend your time on these activities? Besides the potential relevance boost you’ll get from the additional content, you’re also sending valuable engagement signals. Regularly logging into your listing and providing content shows Google that you’re an active and engaged business owner that cares about your listing, and the local search experts are speculating that this is also providing ranking benefits. There’s another engagement angle here too: user engagement. Provide more content for users to engage with and they’ll spend more time on your listing clicking around and sending those helpful behavioral signals to Google.