If you were given a large data set, such as the sales over the last year of our top 100 customers, what might you be able to do with these data? what might be the benefits of describing the data?

The best thing to do with data such as sales over the last year of the top 1000 customers would be to answer questions like:
1) what products sell the most: This would help the marketing department,for example on targeting what items to push.
2) what groups of people buy what product: Again this would be targeting who buys what. We may discover that males prefer product A and females prefer product B. Or young customers prefer different products that older. This would help marketing also on targeting sales.

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