Competitors might enter a market and usurp a brand's position. Websites that receive many inbound links can be more likely to rank higher in search engines. Basically, inbound links tell site crawlers that your website is an authority on a certain subject -- so the more inbound links you have from …

If you're willing to vouch for links added by third parties (e.g. if a commenter is trusted on your site), then there's no need to use nofollow on links; however, linking to sites that Google considers spammy can affect the reputation of your own site. The creatives on the …