Assume a small universe of four web pages: A, B, C and D. Links from a page to itself, or multiple outbound links from one single page to another single page, are ignored. PageRank is initialized to the same value for all pages. In the original form of PageRank, the sum of PageRank over all pages was the total number of pages on the web at that time, so each page in this example would have an initial value of 1. However, later versions of PageRank, and the remainder of this section, assume a probability distribution between 0 and 1. Hence the initial value for each page in this example is 0.25.

Nathan: The comment by Mansi Rana helps answer your question. The fact is, the PageRank scores that were visible in the Google Toolbar hadn’t been updated in a long time (2+ YEARS), so they were probably getting more and more out-of-date anyway. The main reason Google would make them disappear, though, is that Google wants website owners to focus on the user and on quality content, not on trying to game the system with links.
Trust is another important bucket that you need to be aware of when you are trying to get your site to rank in Google. Google doesn’t want to show just any website to it’s searchers, it wants to show the best website to its searchers, and so it wants to show sites that are trustworthy. One thing Google has indicated it likes to do is penalize sites or stores or companies that consistently have poor reviews, so if you have many poor reviews, in time Google is going to figure out not to show your site in their rankings because Google doesn’t want to show those sites to their searchers. So prove to Google’s algorithm that you are trustworthy. Get other highly authoritative websites to link to you. Get newspaper articles, get industry links, get other trusted sites to link to you: partners, vendors, happy customers - get them to link to your website to show that you are highly credible and trustworthy.
For that reason, you're probably less likely to focus on ‘leads' in their traditional sense, and more likely to focus on building an accelerated buyer's journey, from the moment someone lands on your website, to the moment that they make a purchase. This will often mean your product features in your content higher up in the marketing funnel than it might for a B2B business, and you might need to use stronger calls-to-action (CTAs).
Once consumers can access this content, they want to engage with something that fits their needs and is sensory and interactive — from the early popularity of web portals to the spread of online video, to the next generation virtual realities. Their digital desires are marked by a thirst for content. The old media adage that “content is king" is correct. There is no question that the desire to engage with content is a key driver of customer behavior.
Building on site authority and trust (off-site optimization) is one of the most critical search engine ranking signals. Search engines measure the popularity, trust and authority of your website by the amount and quality of websites that are linking to your site.  We work with our clients to develop an SEO strategy which stimulates link acquisition organically and supplements those strategies with additional services. Our content / editorial marketing finds the highest quality websites that are relevant to your business, and where you are positioned organically on authoritative and trusted site.

If we look at these other definitions of digital marketing such as this definition of digital marketing from SAS: What is Digital Marketing and Why does it matter? or this alternative definition of digital marketing from Wikipedia we can see that often there is a focus on promoting of products and services using digital media rather than a more holistic definition covering customer experiences, relationship development and stressing the importance of multichannel integration. So for us, the scope of the term should include activities across the customer lifecycle:
When Site A links to your web page, Google sees this as Site A endorsing, or casting a vote for, your page. Google takes into consideration all of these link votes (i.e., the website’s link profile) to draw conclusions about the relevance and significance of individual webpages and your website as a whole. This is the basic concept behind PageRank.
Robots.txt is not an appropriate or effective way of blocking sensitive or confidential material. It only instructs well-behaved crawlers that the pages are not for them, but it does not prevent your server from delivering those pages to a browser that requests them. One reason is that search engines could still reference the URLs you block (showing just the URL, no title or snippet) if there happen to be links to those URLs somewhere on the Internet (like referrer logs). Also, non-compliant or rogue search engines that don't acknowledge the Robots Exclusion Standard could disobey the instructions of your robots.txt. Finally, a curious user could examine the directories or subdirectories in your robots.txt file and guess the URL of the content that you don't want seen.

Digital media is so pervasive that consumers have access to information any time and any place they want it. Gone are the days when the messages people got about your products or services came from you and consisted of only what you wanted them to know. Digital media is an ever-growing source of entertainment, news, shopping and social interaction, and consumers are now exposed not just to what your company says about your brand, but what the media, friends, relatives, peers, etc., are saying as well. And they are more likely to believe them than you. People want brands they can trust, companies that know them, communications that are personalized and relevant, and offers tailored to their needs and preferences.
Not all links are counted by Google. For instance, they filter out links from known link farms. Some links can cause a site to be penalized by Google. They rightly figure that webmasters cannot control which sites link to their sites, but they can control which sites they link out to. For this reason, links into a site cannot harm the site, but links from a site can be harmful if they link to penalized sites. So be careful which sites you link to. If a site has PR0, it is usually a penalty, and it would be unwise to link to it.
We'll confirm that your website and pages will be correctly indexed by search engine spiders. This includes a thorough analysis using our tools to identify broken links, canonical errors, index bloat, robots.txt file, xml sitemap, bad links and other search engine spider roadblocks. In addition, we provide guidance about SEO improvements that can be made to your site’s internal linking structure and URL structure that will build your site’s authority.
Facebook Ads and Instagram Ads take relevance and ad engagement into consideration. Ads that perform well are given a higher relevance score and are given more impressions at a cheaper price than ads with low relevance. Similarly, AdWords assigns ads a quality score based on factors like keyword relevance and landing page quality that can affect how much you pay for each click.

In March 2006, KinderStart filed a lawsuit against Google over search engine rankings. KinderStart's website was removed from Google's index prior to the lawsuit and the amount of traffic to the site dropped by 70%. On March 16, 2007 the United States District Court for the Northern District of California (San Jose Division) dismissed KinderStart's complaint without leave to amend, and partially granted Google's motion for Rule 11 sanctions against KinderStart's attorney, requiring him to pay part of Google's legal expenses.[69][70]

It’s good for search engines – PPC enables search engines to cater to searchers and advertisers simultaneously. The searchers comprise their user-base, while the advertisers provide them with their revenue stream. The engines want to provide relevant results, first and foremost, while offering a highly targeted, revenue-driving advertising channel.
Pay-per-click, along with cost per impression and cost per order, are used to assess the cost effectiveness and profitability of internet marketing. Pay-per-click has an advantage over cost per impression in that it conveys information about how effective the advertising was. Clicks are a way to measure attention and interest: if the main purpose of an ad is to generate a click, or more specifically drive traffic to a destination, then pay-per-click is the preferred metric. Once a certain number of web impressions are achieved, the quality and placement of the advertisement will affect click through rates and the resulting pay-per-click.

Let’s start with what Google says. In a nutshell, it considers links to be like votes. In addition, it considers that some votes are more important than others. PageRank is Google’s system of counting link votes and determining which pages are most important based on them. These scores are then used along with many other things to determine if a page will rank well in a search.

Webmasters and content providers began optimizing websites for search engines in the mid-1990s, as the first search engines were cataloging the early Web. Initially, all webmasters needed only to submit the address of a page, or URL, to the various engines which would send a "spider" to "crawl" that page, extract links to other pages from it, and return information found on the page to be indexed.[5] The process involves a search engine spider downloading a page and storing it on the search engine's own server. A second program, known as an indexer, extracts information about the page, such as the words it contains, where they are located, and any weight for specific words, as well as all links the page contains. All of this information is then placed into a scheduler for crawling at a later date.