Read this website: https://www.usgs.gov/products/data-and-tools/data-management/data-dictionaries
Within the reading there are a lot of links to explore more information. Click on a few of them.
Choose the link you found most interesting and answer the following questions:Why was this link most interesting to you?
What do you consider the 2 most important take-a-aways from the link?
How did this grow your understanding of data dictionaries and their importance in database design?