Well, after much resistance, I've taken the plunge and am trying to understand styles, CSS, Class vs. ID, Page layout/flow, etc.I've picked up the book "HTML for the WWW (w/ XHTML and CSS) 5th Ed ...

The use of classes is also very common when creating webpages. Classes operate in a similar way to element IDs but rather than relating to the id of an individual element, styles for a class can ...

Google’s Search Relations team explains how CSS affects SEO, addressing myths about class names, pseudo elements, and page performance.