Page amend and optimisation

Hi @dawsonski. To start with, you can view your template and version number by logging into your site and clicking "Help".

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"wondering if it is possible add additional pages to this template?

Yes, it is. Since you are seeing pages organized as sections within a single page, you are most likely viewing an "index page". These pages are actually a special type of page, whereby "child" pages placed inside of the "index page" become "sections" rather than separate page. To add separate pages (instead of sections), you can add pages to your navigation for those sections outside of the index page. (In theory, you could also drag and drop the index "section" from inside the index page to outside it, thereby making the page it's own page. But if this is a live website, better to leave the existing site intact and create new content. Then, once you have everything ready to go, enable your new home page and navigation and disable the old index page.)

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"does the site need to be replicated using a different template?

No, since you should be able to add pages as needed using the template you have now. In fact, if you did want to explore other templates, you can switch and preview templates without replicating the site separately. Just be sure to read up on that link, especially if this is a live website, so that you're not surprised by reorganized content or changed styles.

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"Can Anyone explain the variety of names?"

Many templates in Squarespace are part of a "template family". In this particular case, the template 55f0aac0e4b0f0a5b7e0b22e represents the "Brine Family" of templates (also/formerly referred to as the "Wright Family"). Templates within a family generally share the same features and style options, though they are configured differently from the start (thereby distinguishing templates from each other even when in the same "family". At this time, the Brine/Wright family of templates are generally considered the flagship/best template in many cases.