Outlining Text in Illustrator Tutorial
Outlined text refers to a font that has been converted into a vectored format.
Vectored text can be scaled infinitely without any loss of image quality. That means your text will appear smooth and crisp at any size or resolution and will print clearly on your graphic. Also, it's possible to open and print your artwork correctly without needing the actual font file used.
Note: Once text is outlined, it can no longer be changed / edited.
How to Outline Text Font Using Adobe Illustrator: