For example, on the "Medical Services" page in the lower yellow box the text is very close to the top of the box. Padding allows more space between the text and the edge of the element. Similarily on the "Weight Control" page the text is very close to the left edge.
Re: Squarespace: I've never used it, but it just looks like an online version of iWeb as far as functionality goes. Your page is fine if it does what it needs to do; provide some basic information about your clinic.