You can call Google Ads as Google Adwords. It is a product that you can use to promote your business, sell your products and services, raise awareness, and increase traffic to your website. Google offers paid advertisements which appear in search results on google with the use of Google advertisements that appear on other websites. You can manage your Google Ads account online. 
How to get started with Google Ads?
To start advertising your business on Google you need to create your AdWords account. This will help you in set up your first ad campaign and enter your billing information so you can start reaching customers. Then sign in to your account and find your another new ads on Google. With the help of your account you can create and change your ad campaign at any time, including your ad text, settings and budget. 
How Google Ads works?
Google Ads, it’s currently divided into two different Google networks, each one containing varied advertising options to better fit your goals:
a. Search Network: The search network contains promoting areas like the real query items on Google, other Google properties like Google Maps and Google Shopping, just as accomplice destinations on Google that show text advertisements. In this network when you search for something you might see direct products images on a Google search result.
b. Display Network: Whereas the display network centers around stages and promoting techniques that aren’t text-based like the search network. We mean platforms like YouTube, Gmail and a huge number of partner sites on Google. Have you ever noticed image advertisements on the sidebar or headers of a website you have browsed? Those are ads on Google partner sites on the display network.