A tsv file is basically a text file that stores data in a tabular format, with each column separated by a tab character, hence the name tab separated values. It's similar to a csv file, which uses commas to separate columns, but tsv files are often preferred when working with large datasets or when commas are part of the data itself. You can open a tsv file using any text editor, like Notepad or TextEdit, but it's often more convenient to use a spreadsheet program like Excel or Google Sheets, which can automatically format the data into columns and rows.