Why is Google so popular?

I am sure you like watching YouTube or looking for the fastest way on Google Maps. Maybe you even translate this sentence with Google Translate.
But why is Google so popular?

Google apps are already installed on the Android smartphones. On 17.08.2005 Android was bought for 50 million by Google. But that is not the only one. Later they took over companies like YouTube, ZYNC, Dropcam... Google has already bought more than 100 companies. Besides, Google has a service for everything.
I am sure you do not know all their products.
Here you can see them all:
https://www.google.com/about/products/

Google discovers all trends very quickly. For example, they respond by buying a company that follows this trend.

The browser and the many other services are free. This is a main reason why the platform is used so much.

They also operate a lot of environmental protection. For example Blackle. Blackle is a search engine that displays the letters not on a black background but on a white background.

Sources
http://mobilethings.de/2014/warum-google-so-erfolgreich-ist/
https://www.ibrahimevsan.de/2014/01/15/google-fusionen-und-uebernahmen/
https://www.google.de/intl/de/about/products/
https://pixabay.com/de/photos/?q=google&hp=&image_type=all&order=&cat=&min_width=&min_height=