The document is a series of tweets by Ian Lurie discussing best practices for data visualization for marketers. It begins by outlining rules for providing instant clarity in visualizations, such as reducing mental tasks, maximizing the data-ink ratio, using natural colors, and removing non-data ink and redundant ink. It then discusses how to set instant context by getting to the point, answering questions with "meh", and using small multiples. Finally, it covers enabling drill-down through consistency, using tools like trendlines and formatting tables. The overall message is that following basic design principles can help visualizations be instantly clear, provide proper context and allow for easy exploration of the data.
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