Typography is the art or technique of arranging type. It's a broad medium, covering areas such as typeface selection, line length, line spacing, kerning, tracking, and of course wider design features such as color, lighting etc...
Since their inception, blogs have often had some of the most innovative, beautiful and creative designs in the web design community. This is perhaps because bloggers are naturally expressive individuals who enjoy visual and written expression.
Many websites these days have some form of welcome area on their homepage. Welcome pages generally act as an introduction for new visitors, explain the website and often prompt an action on the part of the user.
Within web design 'calls to action' can be defined as any element of the page that prompt an action of the user. However, clearly some actions are more desirable than others. For example, any site owner would prefer users to click on a 'buy now' link than a 'twitter' link.