Google CEO Sundar Pichai

Google is on a collision course with the government over its size and dominance.

Alphabet, Google's parent company, is a sprawling operation whose businesses include web searches, maps, the YouTube video platform and the Android mobile operating system. Google's products have become ubiquitous across the globe. Many of its services have more than a billion monthly users apiece.

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Google is one of the most powerful companies in the world, and rivals have accused the tech giant of wielding its might to stifle innovation and competition. Now the US Department of Justice, state attorneys general and Congress are taking those allegations seriously. A DOJ antitrust lawsuit could be filed by the end of the month, according to The New York Times.

Antitrust scrutiny into Google isn't new. In 2013, the Federal Trade Commission wrapped up a two-year investigation into Google after allegations of biased search results. The agency, however, decided that Google wasn't violating any antitrust laws.

The renewed spotlight comes as tech giants more broadly face a reckoning over their scale and influence. Legislators and regulators are concerned over how that power might ultimately harm consumers, especially by choking off competition from smaller players in Silicon Valley.

Aside from Google, rivals Apple, Amazon and Facebook are also under investigation by federal regulators and lawmakers. In July, Google CEO Sundar Pichai appeared virtually at a hearing before the House Judiciary Antitrust Subcommittee, alongside Facebook CEO Mark Zuckerberg, Amazon CEO Jeff Bezos and Apple CEO Tim Cook.

Of the companies, Google is in the most imminent danger of antitrust action. Several areas of Google's business are being scrutinized, and there are nuances to the situation playing out at the DOJ.

Here's what you need to know about Google's antitrust battles:

Google's dominance in web search, digital advertising and smartphone software are the primary areas of interest to lawmakers and regulators.

The company processes around 90% of all online searches in the US. That stranglehold is the foundation of Google's massive advertising business, which generates almost all of the company's $160 billion in annual sales. Google has been accused of hurting competitors by prioritizing its own products, like shopping ads or local business listings, over the listings of rivals in its search results. Critics also complain that the tech giant takes content from publishers and other websites and uses that information in prepared answers directly on Google's search engine, rather than simply providing a list of links that send users away to other sites.

Google's ad business is also under a microscope because the company owns every step in a complicated system that connects ad sellers and buyers, which rivals say gives Google an unfair edge over the market. Much of the company's advertising prowess comes from acquisitions, including the 2008 buyout of the ad-tech firm DoubleClick.

The company also owns the Android operating system, the most popular mobile software in the world. Its dominance is hard to overstate; Android powers almost nine out of every 10 smartphones shipped globally. The tech giant has been accused of using that dominance to strong-arm partners to bundle Google's apps, like search and Maps, into their offerings.

The DOJ could file a lawsuit as soon as the end of the month, according to the Times report, but the exact timing isn't known. Attorney General Bill Barr and the 40 or so lawyers working on the case have disagreed over when it should be filed, the Times reported.

There's also an internal dispute at the DOJ over how broad the complaint should be. One team of lawyers is looking into Google's search business, while another is probing its advertising business, according to The Wall Street Journal.

It could be. Most of the DOJ lawyers on the probe argued they needed more time to build a strong case against Google, though Barr is said to have overruled their guidance, according to the Times. Some of the attorneys are concerned the aggressive timeline, with work completed before the election, is to ensure the Trump administration gets credit for taking on a big tech company. The lawyers viewed the September deadline as arbitrary and laid out their argument for a longer timeline in a memo that spanned hundreds of pages, the Times said.

Google declined to comment. The DOJ didn't return a request for comment.

Bipartisan support exists for antitrust scrutiny of Google. But some Republicans have cheered on the investigation alongside accusations that the tech giant censors conservative voices. President Donald Trump has repeatedly accused Google of foul play without evidence.

Two years ago, the president claimed that Google's search results were "rigged" to promote negative news stories on Trump. At the time, he told reporters, "I think Google has really taken advantage of a lot of people." He added, "Google and Twitter and Facebook, they're really treading on very, very troubled territory, and they have to be careful."

Last September, Texas Attorney General Ken Paxton announced an antitrust probe into Google's massive digital advertising business. The investigation has the participation of AGs from 48 states, the District of Columbia and Puerto Rico. As part of the probe, Paxton's office sent Google a civil investigative demand that asked for key information about its ad operation and data collection policies. The coalition of AGs is reportedly looking into Google's Android business, too.

The states are expected to file charges against Google, but it's unclear if they will join the DOJ's complaint or file one separately.

Google -- along with Apple, Amazon and Facebook -- is the target of a broader probe by the House Judiciary's antitrust subcommittee into Silicon Valley's market dominance. One of the goals of the investigation is to explore whether the US needs new competition laws to govern the tech giants in the digital age.

The subcommittee, led by Rhode Island Democrat David Cicilline, has gathered more than 1.3 million documents from the tech giants, competitors and antitrust enforcement agencies during the more than yearlong investigation. The culmination of the probe was July's historic hearing, in which the CEOs from all four companies appeared via video chat, an accommodation of the House's rules amid the coronavirus pandemic.

A report on the subcommittee's findings is expected in coming months.

Google's antitrust woes aren't limited to the US. Last year, the search giant was hit with a $1.7 billion fine from the European Commission for "abusive" online ad practices. The commission said Google exploited its dominance by restricting its rivals from placing their search ads on third-party websites.

Two years ago, the EU's executive arm fined Google a record $5 billion for unfair business practices around Android, its mobile operating system. The investigation focused on Google's deals with phone manufacturers, requiring them to preload specific Google apps and services onto Android phones.

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Google's antitrust battles: What you need to know - CNET