Sometimes visitors will reach a 404 or “Not Found” error page from your site. This may happen when they type in a filename that they think is available on your site, or reach a deleted or non-existent file or directory from an obsolete link on one of your pages.

It’s valuable to see these requests so you can learn what visitors are looking for, and consider adding new content or fixing the broken link. Please follow the steps below to obtain reporting on missing or error pages [...]

Read the full article at: Google Analytics Help

Did you know that the number of website hosts that have been submitting Sitemap files has almost tripled over the last year? It’s no wonder: the secret is out – as a recent research study showed, Sitemaps helps search engines to find new and changed content faster. Using Sitemaps doesn’t guarantee that your site will be crawled and indexed completely, but it certainly helps us understand your website better [...]

Google supports now Sitemaps up to 50.000 entries, so enough for the most websites. Also the webmaster tools have been updated. Check out the sitemap-options. There are also links to resources for coders, to produce the sitemap-files with the right syntax.

Read the full article at: Google Webmaster Central Blog