Use of Robots.txt, htaccess,nofollw,index: It actually falls in the on-page optimization settings but i think sitemaps and other above said factors should be mentioned in off-page optimization also.
Matumizi ya robots.txt, htaccess, nofollw, ripoti: Ni kweli iko katika mazingira ya juu-ukurasa optimization lakini nadhani sitemaps na wengine juu alisema sababu lazima alieleza katika off-ukurasa optimization pia.