We the internet users, have Google accounts and using at least one Google product in our daily online life. Daily we are creating/importing several types of data using different Google services, like videos in YouTube, images in Picasa, contacts in Gmail.
Google is providing options to backup our precious online data, from each and every Google service we are using. But it is easier if we have a centralized location, from where we can export all the data from different services. That is what Google Takeout provides. We can download our data from different Google products as a single archive by using the Takeout tool.