- "Click here" just looks stupid.
- "Click here" looks especially stupid when printed on paper.
- "Click here" is useless in a list of links or when in "links reading" mode, or whenever a link text is considered as isolated from its textual and visual context.
- "Click here" is bad food for search engines. If you say "For information on Unitarianism, ", search engines won't know that your document contains a link to a document about Unitarianism. Some important search engines use the link text in estimating the relevance of a link. Using descriptive link texts thus helps users in finding documents they're interested in, potentially including your document due to a link text with some key word.
- There's usually a fairly simple way to do things better. Instead of the text "For information on Unitarianism, ", you could simply type "".
- "Click here" is device-dependent. There are several ways to follow a link, with or without a mouse. Users probably recognize what you mean, but you are still conveying the message that you think in a device-dependent way.
Describing links correctly