Job Filters are very convenient ways of quickly displaying the Jobs that you are interested in.
e.g. If you have several hundred Jobs, and you wish to display all Jobs that have the description "Ping Server" in their name, you would simply create a filter called, "Ping Server".
Then, when that Filter is selected, only the Jobs with the words, "Ping Server" in their description, will be displayed.
Please note: You do not have to enter any wild * characters (unless you actually have a * in the Jobs description) simply entering, "Ping Server" will suffice. Also, please note that Jobs Filters are CASE SENSITIVE e.g. "Ping Server" is NOT the same as, "ping server" OR, "Ping server".