Regarding <a> and rel attribute

Regarding <a> and rel attribute
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#1

when creating multiple internal links in the same page, do we need to specify ‘rel=internal’, like , or is it not important.


#2

I’ve never read anything about it being mandatory and I’ve never seen it specified in a course, but it could be helpful for anyone doing SEO.


#3

Don’t think that’s even a thing, there is no such link type


https://www.w3.org/TR/html50/links.html#linkTypes