On June 17th various tracking tools across the web reported their suspicion of a Google update.
Several sources reported about the update, e.g.:
Leading speculations regarding these sudden fluctuations are:
- The sudden changes are related to Wikipedia’s transition to the HTTPS protocol a few days prior, rather than being a Google update. This is the leading theory.
- A number of sources estimate that an update affecting and boosting news websites have occurred.
According to MOZ’s analysis (https://moz.com/blog/the-colossus-update-waking-the-giant) this is a result of Wikipedia’s transition to HTTPS and not an update.