Alphabet Inc.’s Google is expected to report historic sales growth in the third quarter, as smaller businesses pour money into digital ads in pursuit of customers whose purchases have shifted online.
The red-hot digital-ad market has accelerated this year, with global spending on track to grow 26%, up from earlier projections of 15%, according to GroupM, a media-buying firm. Much of that windfall has flowed to Google, which has a dominant share of world-wide internet searches, digital navigation and online video viewership.
