This might seem like a stupid question, but do I need to update my website's Robots.txt and/or Sitemap.sml whenever I add pages to my site? Thanks.
robots.txt - depends on what's in it Sitemap.xml - yes, needs to be updated (except you have some automated software that does this)
Right we need to update sitemap.xml. its good that you have asked this question as sometimes an important page is added we have to update sitemap.xml
99% of normal websites, wasting time or effort on either of those, is, well... a waste. robots.txt should only be needed to tell search engines NOT to index things; as a rule of thumb, WHY WOULD YOU WANT TO DO THAT?!? I mean, sure, there are special cases like example directories where you don't want to steal a clients search mojo, but apart from that, just what are you doing that would require a robots.txt apart from a empty one to avoid 404's? Remember, there is no such thing as 'follow' or 'index', the valid values are 'nofollow' and 'noindex'. Sitemaps are one of those bits of noodle-doodle hoodoo-voodoo that only makes sense if your on-site navigation gets down on it's knees in front of the proverbial equine. If all the pages in your site are linked to by other pages in the site so search engines can spider it properly, a sitemap.xml is pointless, redundant, and again, a waste of time and effort. Decent article on the topic: http://www.dailyblogtips.com/qa-what-is-a-sitemap-do-i-need-it/ No matter what the SEO-tards who don't know enough about how this stuff actually works to open their mouths on the subject or the whackjobs who want us to throw extra layers of XML at EVERYTHING tries to tell you. Basically if you "need" a sitemap, IMHO there's something horrifically wrong with how the site is built. Though admittedly with most people sleazing out HTML 3.2, then slapping 4 tranny or 5 lip service on it, "designing" some goof-assed inaccessible PSD then shoe-horning content into it, ignoring all of the progress STRICT and all the advantages of separation of presentation from content -- it's entirely possible that there is indeed something horrifically wrong.