When writing in HTML, the table> tag is a block element that is used to build a table. It is useful when you wish to express data with rows and columns. The essential elements that make up and influence the size of a table are th>, td>, and tr>.An HTML table is defined using the table> tag. A table in HTML is made up of one table> element plus one or more tr>, th>, and td> components. The tr> element represents a table row, the th> element a table header, and the td> element a table cell.