Google has long dominated the online ad market.
The company generates about 85 percent of online advertising revenue.
That dominance has come at the expense of competitors like Facebook and Yahoo, which now control the majority of online ad revenue.
But according to data compiled by the Digital Advertising Alliance, which represents more than 300 online ad networks, Google now accounts for less than 10 percent of all online ad spend, and advertisers will likely struggle to find any meaningful competition for their ad dollars.
The decline of Google, which once accounted for more than half of online ads revenue, will make it harder for online publishers to build out their online networks, said Ben Smith, chief executive of the ad network group.
The group also predicts that online publishers will have to compete more directly with Google and other search giants.
“The big publishers will continue to struggle to keep up with the growth in mobile advertising,” Smith said.
Advertisers will have no choice but to go with the next best alternative, he said.
The future of online publishers is in the hands of a small number of online service providers.
Those service providers have been making a big push to expand their reach and reach advertisers.
Google’s AdWords and Bing ads, which are also powered by AdWords, are among the biggest growth engines in the marketplace.
AdWords advertisers have been using their ad spend to drive traffic to their websites, and they have a huge network of paid publishers who they can partner with to reach their target audiences.
In April, AdWords saw $1.9 billion in revenue and $1 billion in spending.
Bing’s revenue was $1,890 million and $3.6 billion, respectively.
Both services use AdWords to sell their products.
AdSense, which offers the same service for both AdWords advertising and Google ads, has been growing steadily, said Mike McCracken, a marketing director at AdSense.
“They have done very well over the last few years and we expect them to continue to do so in the coming years,” he said in an email.
Adsense’s growth has been driven by two things: increased advertising spending, and the increasing use of its AdWords-powered ad products, McCrackens said.
Google also has been able to boost the share of its ads that go to its paid publishers by making them pay more for their ads.
Adwords advertisers have reported revenue growth of about 30 percent, while Bing’s advertisers have seen their revenue grow by about 30 cents.
The growth of AdWords ads has helped drive the growth of Bing’s AdSense business.
“Bing is a much bigger deal than Google, but it’s still not enough to make up for the declining revenue growth,” Smith added.
But AdSense’s growth is not just confined to Bing.
Google is now the largest ad network in the world, and it has been in the top spot for more years than any other online ad network.
AdGroup, an ad network research firm, has said that Google has more than doubled its ad network size since the beginning of the year.
Adtech, a market research company, has estimated that Google had about $1 trillion in ad spend in 2016, but its network of ad servers has grown from about 10,000 in 2014 to more than 25,000 today.