Changes

Mark table headers with TH and table data with TD. Consider adding scope (col, colgroup, row, rowgroup) to headers and a caption. Ensure your content is machine readable by assistive technologies by utilizing the proper semantic structures. Also make sure you nest your tags properly, example if you open a TR close a TR, if you open a SPAN inside a TD make sure you close the SPAN before you close the TD. Example:

Go to https://webaim.org/techniques/tables/data to learn more.