Duplicate Page Content - default.html

[bhsiao]

I am showing a duplicate content error in moz. I have site.com and site.com/default.html

How can I fix that? Should I use a canonical tag? If so, how would i do that?

[LoganRay]

Yes, a canonical tag will fix that. You might also want to check with your developer to see if they can redirect the /default page to / without it creating a redirect loop.