Open Science is:

A system of practices that  moves towards a more open,  collaborative, data-intensive and  networked way of doing  research and sharing research  results, enabled by  developments in ICT and related  infrastructures and the  increasing proliferation of data.

Or

Open Science is:

Just science done right!

Why is Open Science so important?

It’s good for science: efficiency, verifiability, transparency,  interdisciplinarity

It’s good for the economy: access to and re-use of  scientific information by industry, innovation

It’s good for society: broader, faster, transparent & equal  access for citizens, increased societal impact of science and  research