About External URL Parameters
Some external marketing tools can create a duplicate version of your page's URL with added parameters for tracking purposes. For example, the following URL includes a tracking parameter: https://www.mysite.com/?gclid=Test
How parameters affect search results
How parameters affect AI-generated answers
Duplicate URLs have an effect on AI-powered search tools like ChatGPT, Perplexity, and Google AI Overviews. These tools crawl and index web pages similarly to traditional search engines, which means they can encounter multiple versions of the same page URL (with and without tracking parameters).
When an AI tool has indexed a parameter variant like https://www.mysite.com/?fbclid=abc123, it may cite that version when answering a question about your site.
This causes two problems for your visitors:
The link may not work as expected (since tracking parameters are often session-specific or expire).
Different AI tools may cite different URL versions, making your site look inconsistent.
To prevent this, set a canonical URL for your pages. A canonical tag signals to both search engines and AI crawlers which version of a URL is the official one. With a canonical pointing to your clean URL (e.g., https://www.mystunningsite.com/), AI tools have a clear, consistent reference point and are less likely to surface parameter-based variants in their answers.
