Do I need to set up cron job?

I have asked the server and he has given me the command line to find the wget So I now have - root@lass1-n1s [~]# which wget /usr/bin/wget -O /dev/null "http://stackideas.com/index.php?option=com_easyblog&task=cronfeed"; and all the other input as per your directions in your documentation but my question is Why do I need this? It is sending me emails by the dozen with nothing in them every few minutes....? Do I need this?