SEO Is Agnostic To Web Platforms - Right? Well, Not Exactly…
It turns out that some website CMS platforms have idiosyncrasies that require unique workarounds.
For Squarespace users, duplicate content is often caused by adding a trailing slash like this “/” onto URLs. These URLs could be at the page level, programmed as a redirect (URL mapping), or anchored to hypertext words like this.
By default, Squarespace automatically adds trailing slashes to URLs, adding them only creates a new (and duplicate) URL. Short answer to mastering them, is not to end the URLs pointing to your internal pages with a slash.
Different themes may operate differently, so while auditing your pages for these is time consuming, in many cases the efforts clean up a Squarespace website nicely - and could result in a bump in online visibility via better search engine indexation as a bonus!