During checking my websites after the update, I discovered that almost all of my webpages were dropped , only the main domain & 2 or 3 pages are indexed for each single domain, all are hosted in the same server with different IP addresses & have been performing very well for the last few months with many keywords . My websites are not related nor linked to each other & no significant changes have been done during or after the previous update. I did examine them , their meta tags & robots & found every thing to be ok . What possibly can be the cause of this matter?
