Welcome to the Q&A Forum

Hi Humanique - you don't absolutely "need" a canonical tag on every page, but it is recommended. For example, say I had the URL: https://sparktoro.com/contact and I used a tracking parameter when I shared it on Twitter, like this: https://sparktoro.com/contact?share=twitter. Technically, it's a new URL, but it should be treated exactly like the regular version by search engines. Rel = canonical is a way to do that. You want to take the cleanest, most standard version of any page's URL and make that the one in the canonical tag in the header. Then any alternative versions that crop up through social sharing or tracking or any other way can be easily canonicaled to the right version. Again - you don't have to do this, but it is recommended by search engines and most SEOs. All the best!