What is the latest update in SEO ?

Possum is the name that SEOs place for this update
Possum - A wild-type mice in the night in the United States. Their food is mainly fruits and tops, young leaves. These animals are very fast and often operate at night so one can only see signs of their existence which are rarely encountered at night.
The naming of this update is Possum to refer to the local addresses of businesses now resembling Possum, your business address still exists but no one sees you.

There are some new updates in SEO like
-Google's "Possum" algorithm update
-Growth hacking
-Google mobile friendly update
-Google Hummingbird
-Google EMD (Exact Match Domain) Update

Google confirmed a "core" update on March 7th, but volatility spiked as early as March 4th, with a second spike on March 8th, and continued for almost two weeks. This may have been multiple updates or one prolonged, rolling update.