Tribute page challenge before Bootstrap Lesson?

Hi, can anyone explain me why does the tribute challenge mean by using Bootstrapp it is lessons away from were i am. Did i miss something here? I thought i was going to be at the end of the certification but surprise i dont really know hoy to do much of the stuff in the challenges. Any advice?

you don’t have to use Bootstrap, the challenge says you can if you already know it. But you don’t have to.

Personally I’d suggest using flex box or grid so you can solidify those lessons.