GPON - When to use?

Hello dear Experts,

I would like to know about GPON, if someone can give me a note.
When to use, why to use, positive and negative points of GPON.
Thank you!

GPON is basically a gigabit passive optical Network. It is a new technology mainly upgraded version of providing broadband connectivity on single optical fiber network. Earlier we use two fibers (Tx and Rx) to provide broad band connection. GPON is a technology where you can provide broad band connection to much much greater subscribers than earlier which is limited only.
Its a technlogy which provide upto 10Gpbs speed.
When we need to provide broad band connection to large number of subscribers ,we use GPON technology.