Statista in a nutshell:

Statista is one of the world’s largest statistics, research and market data platforms with access to more than 1 million statistics, forecasts, dossiers, studies and infographics on 80.000 topics from more than 22.500 sources.
The platform combines economic data, consumer insights, opinion polls and demographic trends.
All data can be downloaded within seconds in 4 different office formats. On top, every student, lecturer and member of staff receives full publication and usage rights of the data (useful if you present at a conference for example). Automatic Citation output is included, too.

Tutorials: https://www.statista.com/getting-started/welcome-to-statista