👉 Re-indexing, also known as data transformation or data manipulation, is a process that involves changing the structure of a dataset to make it more suitable for analysis. This can involve rearranging columns in a table, sorting rows, or transforming numerical values into categorical variables. For example, let's say we have a dataset with two columns: "Name" and "Age". We could use reindexing to convert these columns to a different format: ```python import pandas as pd # Create