Market Google parent Alphabet's shares dive as YouTube changes, competition hurt revenue Updated : April 30, 2019 07:48 AM IST Alphabet CFO Ruth Porat attributed slower revenue growth to currency fluctuations, competition and unspecified product changes. About 85 percent of Alphabet's revenue comes from Google’s ad business, which sells links, banners and commercials across its own websites and apps and those of partners. Google CEO Sundar Pichai said revenue slowdowns should be expected as the company focuses on the long term. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.