 I'm Monica from the Public Health Rebrand to Data Science program, and here is your Data Science tip for the day. Data Science Tip number three. If you choose to download data from an online portal that allows you to set criteria, don't do it on the fly. First, use the portal to study the variables and values in the data. Then make a data dictionary to guide your work. After all, you want to be able to replicate your extract. Want to excel in health data science? Follow my channel to learn more about my mentoring program for career advancement.