I found this page through a list of links Google has on SEO.

Add a link on your site to a text object (e.g., Anti Spam): https://www.auditmypc.com/freescan/antispam.html with Open link set to New Window or Tab "_blank".
Code:
<a href="https://www.auditmypc.com/freescan/antispam.html" target="_blank">Anti Spam</a>
If you follow the above link, the page describes why it has merit.

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