A jingle will help brand your business and build an identity that will last as long as you continue to use it. 
Many major corporations owe their success to jingles. As examples:

"You’re In Good Hands With Allstate"
"The Best Part of Waking Up Is Folgers In Your Cup"
"Like A Good Neighbor, State Farm Is There"
"GE, We Bring Good Things to Life"

There are many others jingles that haven't been on the air in years that people still remember:

"You Deserve a Break Today at McDonalds"
"It's the Real Thing" Coca Cola…and hundreds of others.

Click here for a sample 1-8-MORTGAGES Jingle                     
Highlighting Pacific Guarantee Mortgage
http://www.18mortgages.info/1-8Jingle.html