without sounding uncharitable - they look unfinished
let me take the teeth whitening as an example
your nav list still has the bullet points showing
if you have margins between paragraphs then you don't need indents at the beginnig of a line
text is too small, needs more line-height
the ad at the top looks amateurish
image should be high up the page
no header or logo or anything
lots of code errors
links are default blue
have a look at some of these and google some typography/design/colour sites