Along with the product, it also comes with very clear instructions for use. In order to apply it perfectly and without any problems, you will also need a level surface (e.g. a table) and somewhere to plug it in so that dust does not settle on the screen or the back (the part that sticks) of the glass. It is also thin and durable (meaning that if you have nails and type with them, it does not leave marks). It has not yet fallen for me, but in any case, screen protectors are meant to protect the screen. Finally, it comes with a microfiber cloth that you can use to clean whenever you want.