Bing is testing a new hover effect for its “People also search” keywords. As I remember, Bing has experimented with this section before sometimes showing the keywords underlined in grey, and at other times in blue, as I’ve spotted now.

Here is a screenshot of this.

This is a solid test, since blue typically signals a clickable hyperlink in search results. If keywords turn blue on hover, users are more likely to recognize them as clickable and click through to a new search.

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Source:: searchenginewatch.com