There are multiple ways to convert a CSV file to Excel formats (XLS, XLSX). You can use Microsoft Excel, a dedicated converter freeware, or an online tool to perform the conversion. But ...

While Excel is incredibly powerful for organizing ... Suppose you work for an e-commerce company and receive daily sales ...

and there among all the files would be a CSV file full of your tweets and the associated metadata. You could then load the CSV into Excel, convert it into a table, and save the resulting workbook.