Essentially it means that if you have a V2 map then you should migrate it to V3 before that date. Failure to heed this warning may mean those maps will fail without further notice.
I'm curious as to why you find this requires additional information. It's pretty plain and without obfuscation. -John Coryat -- You received this message because you are subscribed to the Google Groups "Google Maps API V2" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-maps-api/-/HI5Hyx8DZv4J. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-maps-api?hl=en.
