A Few of My Thoughts on SEO
This is going to be a short post.
First, a caveat: No one SEO tactic is the end-all be-all, in and of itself. It is part of a bigger picture using other SEO tactics. So, emphasizing keywords alone will be useless. Several SEO tactics need to be part of your overall SEO plan.
Second, I'd like to clarify that there are different points of view on this.
However, many webmasters still believe certain tactics—such as alt tags/attributes and keyword emphasis, such as bold, underline, italics—although they aren't critical to overall SEO, certainly don't hurt efforts.
In addition, many webmasters and SEO experts who do agree with subtle use of keyword emphasis think it's okay to underline if another element is used, such as italics, to distinguish it from a text hyperlink. Also, it's recommended if you underline text, don't use blue font (again, to avoid confusion with hyperlinked text).
Some supporting reading:
Often referred to as the "marketing maven" by industry peers, Wendy Montes de Oca, MBA has nearly 20 years of experience in marketing, media, and publishing with expertise in multichannel, direct response, and Web marketing. Wendy has generated more than $150 million in total revenues for Fortune 500 companies, top publishers, consulting clients, and her own firm, Precision Marketing and Media, LLC. She is the creator of the groundbreaking SONAR Content Distribution Model and author of the best-selling book Content Is Cash: Leveraging Great Content and the Web for Increased Traffic, Sales, Leads and Buzz [Que Publishing, Paperback].