Google 4 Manual Book page 205

IMPORTANT: When you verify apps,
Google receives log information, URLs
related to the app, and general infor­
mation about the device, such as the
Device ID, version of the operating
system, IP address, and one or more
cookies.
Control app verification
App verification is turned on by default, but
no data is sent to Google unless you agree to
allow this when asked in the dialog that ap­
pears prior to installing the first app from an
unknown source.
To control app verification, go to Settings >
Security > Verify apps.
If you attempt to install an app that may be
unsafe, you may see one of the following
dialogs:
SECURITY SETTINGS 196