Web authors, anxious to add creativity to their pages by influencing the presentation, began to use Netscape's proprietary extensions rather than the more powerful style sheets. This was quite natural, since Netscape's proprietary extensions could be seen by a significant portion of Web users, while few would see style sheet enhancements. Today, more and more browsers are implementing style sheets, opening authors' eyes to unique features that allow influence over presentation while preserving platform independence. The advantages of style sheets became apparent, as did the disadvantages of continually creating more HTML tags for presentation effects. If no author-supplied style suits the user, he or she can simply ignore the author's style.
Style sheets can make an author's life much easier.
With style sheets, one only needs to specify such presentational preferences once , and the style can be applied to an entire site. Not only that, but style sheets also reduce download time when one file contains all the style information. Style sheets also offer much more flexibility in terms of the presentation effects that they provide. Properties such as color, background, margin, border, and many more can be applied to all elements . Style sheets give the flexibility of applying a style to all paragraphs, or all level-two headings, or all emphasized text.