What Sort of Impact does Duplication of Content have on Internet Rankings?

Duplication of content can negatively impact internet rankings due to the following reasons:

1. Search Engine Confusion: Search engines may struggle to decide which version of the content to index or rank higher, potentially diluting visibility.

2. Penalization: While search engines, especially Google, have clarified that they don't impose strict penalties for duplicate content, they might filter out similar content, resulting in only one version being prominently displayed.

3. Decreased Authority: Splitting backlinks between duplicate content can reduce the authority of each piece, as the link equity gets divided.

4. User Experience: Repetitive content can harm user experience, leading to higher bounce rates, which can indirectly affect rankings.

In essence, unique and valuable content is always preferred for optimal search engine rankings.

If a Domain has a Landing Page, Shared with Many other Domains, What is the Effect of Adding Content to that Landing Page?

If a domain shares a landing page with many other domains, adding content to that landing page can have several effects:

1. Improved SEO: Quality content can boost search engine visibility for keywords associated with that content.
2. Increased User Engagement: Relevant content can enhance user experience, leading to longer page visits and lower bounce rates.
3. Potential Confusion: If the content isn't relevant to all domains pointing to the landing page, it might confuse or mislead some visitors.
4. Brand Distinction: Unique content can help differentiate the domain from others sharing the same landing page.
5. Increased Load Time: If not optimized, added content might slow down the page, negatively impacting user experience and SEO.

In summary, while adding content can improve engagement and SEO, it's crucial to ensure its relevance and optimize for performance.

But Would the Search Engine Identify the Content as Plagiarism? 

If multiple domains point to a single landing page with identical content, search engines typically don't view it as plagiarism. Instead, they see it as duplicate content. Search engines, particularly Google, have mechanisms to handle duplicate content:

1. Canonical Tags: These tags can be used to indicate to search engines which version of the content is the "original" or preferred, helping to consolidate ranking signals.

2. Filtering: Search engines might choose to display only one version of the content in search results to offer diverse results to users.

3. Potential Ranking Dilution: While there isn't a strict "penalty" for duplicate content, spreading content across multiple domains can dilute its ranking potential.

Thus, while it's not seen as plagiarism, duplicate content can have other SEO implications. It's always a good practice to use canonical tags or ensure unique content across domains to maximize SEO benefits.

Is there a Way to Make the Same Page Different When Viewed with Different Internet Domains?

Yes, you can serve different content or styles based on the domain used to access the page. This is commonly done using server-side scripting. Here's a basic approach:

1. Detect the Domain: When a user visits the page, check the HTTP header or use server-side scripting to determine which domain they accessed.

2. Serve Custom Content: Depending on the detected domain, display different content, styles, or layouts.

3. Database Integration: For more dynamic setups, tie the domain detection to a database that dictates which content gets displayed.

4. Use of Content Management Systems (CMS): Some CMS platforms have built-in multi-domain or multi-site support that allows serving different content based on the accessed domain.

However, ensure the user experience remains consistent and avoid practices that might be seen as deceptive by search engines.