b will turn selected text bold
i will italicise selected text
link creates a hyperlink for the selected text
b-quote distinguishes quoted text
del will delete selected text by displaying with a strike through
img will allow you to enter a url to link to an image
ul, ol, li – these buttons are for creating lists. ‘li’ assigns the text as a list and is used in conjunction with ‘ul’ unordered list (bullets) or ‘ol’ ordered lists (numbered bullets).
The other two are more for coding and you shouldn’t need to use them.