Google has expanded far beyond its original claim to fame as a search engine. Alphabet owns Google, as well as many other companies. However, Google itself owns companies. The reach of this technology giant is so vast it is hard to imagine an area of modern life it has not touched.

Google owns more than 200 companies, including those involved in robotics, mapping, video broadcasting, telecommunications and advertising. Google is growing through acquisitions, but it is also increasing revenues in each of the companies it owns. In cases where an acquisition cannot grow revenues, Google tends to sell that company.

We have selected four companies to highlight based on their ability to produce consistent revenues. Each of these companies has a history of attracting customers and monetizing their services. All figures are current as of September 5, 2017.

1. Google Maps

You can look up any location in the world using Google Maps. The views are aerial for the most part, but Google also provides street-level views of many cities. Google Maps is embedded in real estate sites, as well as sites for businesses that want to make sure you can find them. And that's how Google Maps makes money.

Companies pay to be included in Google Maps searches. Companies may also be featured as the user zooms in or out on any given map. Google does not list how much money it makes from Google Maps, but analysts predict the company will earn an additional $1.5 billion in 2017 from advertising. (See also: How Does Google Maps Make Money?)

As of July 2017, the Google Maps Local Guides introduced gamification to persuade local users to update data and add photos of local venues. This may increase the number of users, and thus the value of Google Maps.

2. AdSense

AdSense is Google’s network for selling advertising on its partner sites. Google provides text, images, videos and interactive media for a fee.

This service has become the standard for advertising online, and Google doesn’t seem to be losing ground with it. AdSense provides 22% of Google’s income. It is used on more than 14 million websites.

3. DoubleClick

DoubleClick is another advertising service. It can target customers and focus on an advertiser's specific pages to bring in revenues. It also allows website owners to place ads on their websites. DoubleClick can tell a publisher how long visitors are on a site and which pages they stay on the longest.

Online publishers use DoubleClick to build their web traffic, product sales, and service sales. Google also uses DoubleClick to promote its own services. If you have less than 90 million ad impressions per month, the service is free.

DoubleClick earns more than $30.6 billion in annual revenues. Google acquired DoubleClick in 2008. 

4. YouTube

YouTube is highly popular, and users have become accustomed to seeing short ads at the beginning of most videos on the site. It makes $9 billion per year from advertising. However, there is another value to YouTube that is harder to measure in dollars. By owning this company, Google dominates the online video business.

The difficulty for Google is that many people watch embedded YouTube videos without going to the site, where the ads are.

YouTube has become the go-to source for videos, and looks like it will continue to dominate. YouTube has been considered a “break-even” company by many industry watchers, but its presence as a means of popularizing goods, services and entertainment is priceless.

The Bottom Line

Google continues to snap up companies and will continue to grow for the foreseeable future. Not all of the companies have lasted with Google, and it has divested itself of many. 

Google was widely criticized when it acquired YouTube, because critics could not see any way to monetize the service. Its break-even status may continue to present problems. Yet Google continues to find ways to generate revenues with its products and services. Simply put, the company has been visionary in recognizing the income potential for information products. (See also: Facebook, Google to Continue Digital Ad Domination Says eMarketer.)

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