Hold on tight, Google is rolling out an update to their Panda Algorithm (September 2014) From previous experience it can take a while for the organic rankings to settle down again.
Continue to concentrate on delivering a good user experience with plenty of fresh, original and relevant content. Remember that the best measurement these days is on:
- The number of new and returning visitors
- Bounce rate (the length of time visitors stay on a page before clicking away)
- The length of time on a page
Also take into account that targeted traffic can come from different sources. You can find out more about the Panda update here: