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- Use single word labels where possible, instead of multi-word phrases
It is possible to add labels as single words or as multiple words or phrases. In general, it's better to use single word labels, unless you have a phrase that carries a specific meaning for the words together. For example, "Help Center" has a specific meaning, where "Help" and "Center" have different meanings separately.
Avoid using long phrases as labels to boost an article's ranking with respect to a query. For example, "Can I return something I ordered online to my local store." Instead, you should modify the article's title or content to make it literally relevant to the query.
- Do not include variations of the same word, including different tenses or plural forms
You do not need to include multiple labels for variations of a word. For example you do not need a label for "return" and "returns" or "update" and "updated." Search stemming allows different forms of the same word to match. In particular, the singular and plural forms of a word will generally match.
- Use a limited number of labels, instead of overloading an article with labels
Use labels sparingly. Adding lots of labels might actually diminish any matches on labels. This is because it is assumed that matches with a fewer number of labels beats matches with more labels. And too many labels might outweigh the relevance of the title and body.
Your best bet is to look at the top ranked search queries and make sure that they exist in either (but not both) the title or the labels. You don't give content an extra boost if you match a term across the title, body, labels, and comments.
(add related labels macro??)
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