There are also many non-generic and hidden links on the Internet. There are many kinds of posts in the webmaster’s post . This post is only two pages, but there are many administrators and moderators showing up, which is rare.
Do these links that are hidden in the normal sense have an impact on search engines finding pages, passing weights, and page rankings? No one can say no.
For example, the links that appear in Gmail are tracked by Google. Click on the link in Gmail and you will see the tracking code first appear in the address bar, then turn to the link in the real email. So far there is no indication that the links in Gmail will help the page, not to mention the impact on the rankings. However, if Google never thought about using this data, why should it be tracked from the beginning?
These unusual links include:
- Other websites link to your picture. Some websites will steal pictures, steal traffic, and may also give you a link.
- Link to the JS file.
- Link to the CSS file.
- Link to the RSS feed.
- Search engines can see links in emails such as Yahoo Mail, Hotmail, Gmail.
- A link with no index.
- A link with no follow .
- The URL that appears in the JS script or JS comment.
- The URL that appears in the CSS or CSS comments.
- The URL that appears in the image and video file metadata.
- The URL that appears in the HTML file comment.
- The URL of the HTML file header, mmetadata and ALT tags.
- Links and pages that users can track by the toolbar .
- The target URL that you need to see after executing the JS script.
- A link in paid content. The webmaster can set up via webmaster tools so that Google can crawl the links that need to be logged in to see.
- Made a link on the 301 redirected domain name.
- The link in Flash.
- Plain text is not placed in the URL in <a>, such as http://www.chinamyhosting.com/
- Non-web files, such as links in world files, PDFs, TXT files.
- Use the robots file to block links on crawled pages.
- Domain registration data and DNS data.
- A link that appears on the web form.
- Links in other gadget software.
- Links in non-traditional pages such as Twitter, Yahoo, Google Forums, etc.
- Ad links such as links in Google AdWords and other services, such as Google Maps.
Finally, I want to highlight the links that may appear in the picture. We all know that search engines don’t understand pictures, which is why SEO emphasizes text content. But recently Google has made a lot of progress in image processing.
Google acquired a photo processing company a few years ago, and recently has been making new tricks in identifying areas such as colour, type, and facial similarity. So can I identify the URL from the image? If so, can the ad URLs appearing in Google Maps Street View be read? This is probably one of the directions that Google is also studying.