How to stop Google indexing your site when it is under construction or maintenance
When you are creating a new website with Joomla or with any other method on a live server, Google might index the half-done pages and give you crappy search results for some time. Best thing is to block google from visiting the site using the good old robots.txt
change the content of the robots.txt in the root folder to
thats it , google will never look at your site untill you remove these lines. So dont forget to replace these codes with original Joomla robots.txt file contents later.