When you use a font on your file, it may not exist on our computers. As a result, it is automatically replaced... and your text may end up in Comic Sans (yes, it's a risk 😱). By vectorizing it, the text becomes a drawing, so there is no need for a font. The rendering is fixed, faithful and perfect!
👉 Here's how to do it in Adobe Illustrator: Select the text → right click → “Vectorize” (or “Create Outlines”)