Via @eMarketer, #Google's net US #digitalad revs -5.3% Y/Y to $39.58B, $GOOG's share of US #digital ad mkt = 29.4%, -2.2% Y/Y. #digitalmarketing #ecommerce #mcommerce #retail #retailmarketing #digitaladvertising #PPCMarketing #SEO #SEM $FB $AMZN $MSFT