===Nested and closing tags===
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.
===Bold and Italics==
HTML 5 specification states that important text should be denoted with the '''strong''' tag not bold ('''b''' tag) and emphasized text should be denoted with the '''em''' tag not italic ('''i''' tag).
===Underlined text===
Generally don’t underline text on the web that is not a link. Underlines are strongly perceived to be a clickable link which will confuse and frustrate users. Use '''strong''' or '''em''' tags to denote importance and avoid the '''u''' tag.
===Declare language===