Links pass value and authority from one page to another. This is colloquially referred to as "link juice".
Through links, search engines analyze the popularity of a web page based on the number, trustworthiness, authority, and popularity of pages linking to them. Trustworthy sites tend to link to other trusted sites, while spammy sites receive very few links from trusted sources.
There are two fundamental ways search engines use links:
To discover new web pages, which they can then use in their search results
To help determine how well a page should rank in their results
Internal links are useful for three reasons:
They allow users to navigate a website.
They help establish information hierarchy (signal important pages) for the given website.
They help spread link equity (link juice) around websites.
Best Practice for Internal Links
Internal links first: The first 2 or 3 links on a page should be internal links. This way, we can have our link juice flowing internally before sending it out to third parties.
Anchor texts (aka blue words in text): Use descriptive anchor texts so that the reader knows what to expect on the linked-to page. We DO NOT put links on "click here" text.
Make links get clicked: Link to content that is relevant to the context. Internal linking requires a user-focused approach (which links add value).
External links are more influential than internal links
An external link is any link that links out from Vestas to any other website. If another website links to us, this is an external link (backlink) to our site.
External links matter more to search engines because search engines figure: 'Hey, even this stranger links to Vestas, it must be a really good and trustworthy website'.
External links are important for two main reasons
Popularity: the more trustworthy links you have, the more popular you seem to be
Relevancy: the more websites related to your industry link to you, the clearer it is what your position is
Best Practice for External Links
Quality over quantity: Only include external links when needed (but NEVER on the front page). We absolutely DO NOT link to sites that appear spammy because external links can be seen as a recommendation - do we feel confident recommending that source? If in doubt, then we rather don’t link out.
Evergreen links: Only link to external pages with solid URLs. When linking out, we consider whether the page is likely to exist within a year from now. Linking to URLs with lots of parameters in them or linking to time-restricted pages is often not the best strategy, as we will quickly end up with broken links. We try to remove any parameters in the URL that are not necessary.
Open in new tab: When users click on an external link and the external website opens in the same tab we appeared in, then the user is most likely lost. We like to stay in the user's mind, so we open the external site in a new tab, while our website can remain open for the user to return to.
Lower priority to external links: External links should not appear first thing on our pages - the top spots are reserved for internal links. Our pages have in general more internal links than external ones. We DO NOT use CTAs for external links.
Jump links are useful for two reasons:
User Experience: By including jump links within a page, users can directly jump to a specific paragraph on that same page. Jump links are not exactly seen as internal links, because instead of pasting a URL, an anchor (using a #) is used to make a jump on the same page. It's great to include jump links especially for long-form content to improve user experience and help users interact with our pages.
Site Links in search results: By strategically including jump links to link to sections within your content, you might be able to display those sections already in search results. Meaning: extra space to show off!
Best Practice for Jump Links
A jump link consists of 2 items on each page:
1) The jump link: the jump link placed on a word to point to another section on the page (often a list of words that functions as 'table of contents'):
<a href="#codeword">Blue Words Appearing On Page</a>
the 'codeword' needs to be replaced by a short word descriptive of the place the page jumps to
the 'codeword' needs to be unique - no codewords can be used twice on the same page
the '#' sign needs to be included in the link to denote that it is an internal link on the same page
2) The anchor element: the point where the page should jump to (often a headline within the page):
<a name="codeword">
the 'codeword' needs to be EXACTLY the same as used in the above link
no '#' sign should be included in the anchor element
for better user experience, place the anchor element a little higher above the point it is supposed to jump to because the top of the desired view often gets cut off
Common areas to see sitewide links:
Top navigation
Footer
Right-hand-side (RHS) menu or sidebars
Best Practice for Sitewide Links
Look natural: do not include links in sitewide elements that seem suspicious or that do not offer value (e.g., linking to one specific product in the top navigation)
Less is more: keep the number of sitewide links user-friendly (e.g., 32 side-wide links might be overwhelming when trying to find something)
Change around: certain sitewide links (e.g., links to newsworthy content such as "most sustainable company") could get changed once in a while to boost their visibility