Spammy linking pages can reduce

[fomayof928@mowline]

Sites that link to authoritative content may be more likely to be counted than those that don't.
Furthermore, numerous SEO experiments and anecdotal evidence over the years suggest that linking to relevant, authoritative sites can result in a net positive impact on rankings and visibility.

14. the value of other links that host them.
If we take the quote above and focus specifically on the first part, we understand that Google trusts sites less when they link to spam.

This notion can be extended further, as there is australia number data evidence that Google is demoting sites it believes are hosting paid links, or are part of private blog networks.

Spamming linking pages can reduce the value of other links they host.
Basic advice: When relevant and helpful, link to authoritative sites (and avoid linking to bad sites) when it will benefit your audience.

15. No-follow links are not followed, but they can have value in some cases.
Google invented the nofollow link specifically because many webmasters find it difficult to prevent spammy, outbound links on their sites - especially those generated through comment spam and UGC.