One of the reasons for a traffic drop can also be due to your site losing links. You may be seeing a direct loss of that referral traffic, but there could also be indirect effects. When your site loses inbound links, it tells Google that your site isn't as authoritative anymore, which leads to lower search rankings that in turn lead to traffic drops (because fewer people are finding your site if it's not ranked as highly and more).
Looking back at our lab site, we can see that Organic Search is doing well for us. However, if we put a little effort into social media, we’d probably see growth in that sector — and a bigger pie. We’ve got some strong referrals (and high quality links that improve our search presence), but if we put some work into building more of those links, we’d probably see more referral traffic and, again, a bigger pie. Should we add paid search? For this site, no. It’s part of our community service and has little revenue potential, so we wouldn’t see much ROI from ads.
For an Agency like Aira, the speed of AccuRanker is a huge feature - the ability to do fast checks and instant refreshes on keywords means we can diagnose issues as and when they happen, during meetings or when on a client call. We love how quick Accuranker is and how scalable it is across regions around the world. We use it all the time for client reports and are now also making use of the Data Studio connector to pull data into our own existing report templates.