The answer is: It all depends on your baby
Bibs for babies are very practical when something goes wrong during mealtimes. A bib is usually a cloth that can be tied around the neck and chest area. It protects clothing from annoying stains while eating. This is especially useful when your baby is transitioning to vegetable puree and the like.
However, bibs can be used even before the "porridge phase." They keep your baby's neck warm and protect them from drafts.
It can also be helpful to have a cloth that stays in place when breastfeeding or bottle feeding.
Basically, it depends on how your baby accepts the wrap and how easy or difficult it is to put it on.
However, there is no minimum age for using bibs on babies, just follow your instinct.
You know best what is good for your baby.