This is something you have if your nails are quite short, maybe because you are a nail biter and would like your nails to be longer.
Tips are glued onto your own natural nails and then a gel/acrylic product is brushed over the nail and tip to strengthen. They are then "set" under the lamp. Tips can be white, achieving a French look or clear for a more natural look. Coloured gels can also be applied for a different finish.
As your nails grow you then come back to the salon for in-fills, this usually needs doing about 3 weeks after the first treatment.