To stop duplicate content on your website, here are some practical steps:

Merge Similar Pages:

Combine any duplicate or similar content into one solid page. Redirect the old pages to this main one with a 301 redirect. This makes sure search engines and people find the right page.

Use Canonical Tags:

Add a piece of code (canonical tag) to your page's HTML to tell search engines which version of a page is the main one. This is good for pages that are alike but not quite duplicates.

'Noindex' Meta Tags:

Use the 'noindex' tag on pages you don't want showing up in search results, like private or temporary pages.

Redirects:

Use 301 redirects when you change a page’s URL to guide both users and search engines to the new page.

Handle URL Parameters:

Set up your website to control URL parameters. This is important for sites with many product sorting options to avoid duplicate content.

Manage Pagination:

If you have content that spans several pages, use HTML tags to link these pages in order or provide a 'View All' option.

Robots.txt:

This is a file that tells search engines which parts of your site not to crawl. It helps keep unnecessary pages out of search results.

Smart Internal Linking:

Link related pages on your site carefully. This helps show search engines which pages are most important.

Hreflang for International Content:

Use hreflang tags for different language versions of your site. This helps search engines know which version is for which audience.

Use SEO Tools:

Google Search Console can help find duplicate content and set your preferred domain. Tools like Siteliner.com can scan your site for similar content.