I agree with piatkow. I will expand on what was posted.
Links are supposed to be earned. The way to earn them is by providing value. Within the context of links, the definition of value is the usefulness, importance, trustworthiness and worth of your web page. When a site like Epson links to your site they are endorsing your site because it is trustworthy, important, useful and/or worthy.
That is what piatkow is referring to with the statement that the link you described is the Internet working as it should. In other words, the link you describe is a natural link.
You have good cause to be afraid if you are actively building links. But there is no reason to fear if you are not actively building links. Over the years I have spoken with many CEOs and business owners who claim their innocent businesses were penalized without having built links. But with a few probing questions it usually turns out that some link building did in fact occur. In other words, people self-deceive and reports of false-penalizations may be exaggerated.
I have been doing site reviews for about thirteen years across a wide range of business niches. I have yet to encounter and "innocent" penalized site that did not have errors or bad SEO associated with it. A site that gets penalized is usually penalized for a reason. Thus, when it comes to links, you can be assured to be safe if you aren't actively building links. The worst than can happen is that
some links your site naturally attracts are discounted as irrelevant or of little ranking benefit and won't count, either negatively or positively.
That leads to another phenomenon that I call,
Ranking Where You're Supposed to Rank. It's a state of ranking poorly because ranking poorly is where the page deserves to rank, even though the publisher believes the site merits better ranking and lesser sites outrank it. That's not a penalization but it is often mistaken for a penalization. I won't detail the reasons for a
Ranking Where You're Supposed to Rank issue, but it's usually a combination of poor/few links and on-page SEO issues (sometimes something seemingly as innocent as deploying Classic SEO across the site, like hammering long tail keyword phrases in the title tags, etc.)
By getting just one link with that much value I should expect spike in my position in SERP?
In
general the short answer is no, you should not expect a spike in SERP position.
The PageRank meter in the toolbar used to correlate to increases in ranking. But that ceased to be the case at least ten years ago. Majestic has a useful metric called TrustFlow that organizes backlinks by niche. TrustFlow shows you how relevant a backlink is and infers why it may or may not be a valuable. It's one of the most useful metrics I have ever encountered for learning why a link is or is not valuable.
Nevertheless, in general a single link will not spike a SERP position. However that depends on the competition and the competitiveness of the phrase you are trying to rank for. Ranking a site is far more complicated than matching keywords on a web page or matching keywords to anchor text of your inbound links.
I've got to run now, but I hope I've answered your questions.
;)
mb
