When do URL parameters become an SEO problem?

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Query String URL Examples
The most common uses of URL parameters are:

Most SEO-friendly URL building advice suggests avoiding URL parameters as much as possible. This is because, as useful as they can be, URL parameters tend to slow down web crawlers , consuming a good chunk of your crawling budget.

Passive and poorly structured URL parameters that do not modify the content of the list of italy consumer email page (such as session IDs, UTM codes, and affiliate IDs) can create infinite URLs with non-unique content.

The most common SEO problems caused by URL parameters are:

Duplicate Content: Since each URL is treated by search engines as an independent page, a URL parameter may result in multiple versions of the same page, which may be considered duplicate content . This is because a page reordered based on a URL parameter is often very similar to the original page, and some parameters may return the exact same content as the original page.
Crawling budget loss: Keeping a simple URL structure is part of the basics of URL optimization. Complex URLs with multiple parameters create many different URLs pointing to the same (or similar) content. According to Google developers, crawlers may decide to avoid "wasting" bandwidth to index all the content on the website , mark it as low quality, and move on to the next site.