Far more data than we are able to process surrounds us in our every day lives. This is why data visualization has become such a common practice in today's world. The process of taking data and incorporating it into visual experiences through the media encourages people to envision and perceive the data and hopefully find some personal meaning within it. In Edward Tufte's video, Julie Steele discusses that data visualization is more than just a creative process, but actually more of a linear process of decision making based on three basic principles that should always inform your design. The first is what you want to communicate as the designer. The second is accounting for the reader's own opinions and biases and how they will perceive the data. The third is the data itself and how it informs the truth. Since we as humans, have brains that quickly recognize patterns, a lot of information can be communicated visually at once. This is why using colors or images for specific audiences is important so that you can appeal to your audience emotionally and get them to quickly engage with the information.
One lesson that I found particularly important in the video was at the end when Tufte says that it is important when we are looking at data or information, that we see it to learn something from it and not just to confirm something we already believe. So often, people tend to look at data and see it as something they already think they know or believe and use the data to confirm these preconceptions. The purpose of collecting data is to then learn something from that data. It should serve to provide revelations, or show us something we have never seen before. It is important that we always keep our minds open to learning new things through data visualization.