A file extension is a suffix that is added to the end of a file name after a dot. It is usually two to four letters long. File extensions help Windows and other operating systems to know the standard ...

SEOmoz discovered that ending your URLs with a .0 will prevent your pages from being found in the Google index. That means we need to add the .0 to the list of file extensions you should avoid using.

One of our readers reported that all the file extensions have changed to some unknown file format. If so, it could be a virus! If a virus has changed all the files extensions to unknown applications, ...