What TSV is
TSV is CSV with tabs instead of commas. Because tabs almost never appear inside a value, quoting is rarely needed and the files are easier to read by eye.
Bioinformatics, log processing, and anyone who has copied a block of cells out of a spreadsheet: the clipboard format is TSV.
What Markdown is
A Markdown table is rows of pipe-separated cells with a dashed rule under the header. Alignment is set by placing colons in that rule.
README files, GitHub issues, documentation sites, Obsidian and Notion.
What changes when you convert TSV to Markdown
The tab is unambiguous, so there is no delimiter to guess. This is the most reliable of the delimited formats to read.
Cells are padded so the source lines up in a plain text editor, pipes inside values are escaped, and line breaks inside a cell become <br> because a Markdown table row cannot span lines.
What carries over from TSV to Markdown
One property of the TSV has no home in Markdown, and it is worth knowing which before you convert.
A line break inside a cell ends the row in Markdown, so line breaks are replaced rather than carried through.
Markdown marks its header cells differently from its data cells, so the first row is written with that marker.
The identifier 007 comes out of the Markdown as 007. Reading it as a number would have made it 7, and an id that changes value is worse than one that stays text.
The role "Analyst, data" survives with its comma, in one cell rather than split across two. That is the first thing to check in any converted table, and the usual place a Markdown file goes wrong.
The quotes around Jonah "Jo" Pryce are left as a plain quote character in the Markdown.