Google is releasing new advertising products and services to take advantage of the way people use their smartphones to search for items. Google said about one-third of its searches on mobile are location-specific. The new products, which include more detailed text advertisements, additions to Google Maps, and new ways to buy ads, were announced Tuesday by the Alphabet subsidiary at the Google Performance Summit in San Francisco.

"It’s very clear to all the advertisers we speak with, that mobile is here, it’s really the mainstream," said Sridhar Ramaswamy, senior vice president, Google ads and commerce.

Some advertisers are paying more for Google’s mobile ads than for its desktop ones, as the emphasis of the company’s $40 billion-a-year business shifts to mobile devices, he said. Google wants to be able to better show how ads on its search engine translate into in-store sales.

New ad products include enhanced listings on Google Maps, ads that re-shape themselves according to the website they’re seen on and expanded business descriptions in sponsored links. Along with that, Google said it can measure, with more than 99 percent confidence, whether an online advertisement yielded an in-store purchase.

Google will also let advertisers change how much they pay depending on whether they use mobile, computers or tablets, letting them tweak campaigns according to the device.