Capitalization. Also I see a lot of run-on sentences. The first sentence in the description for example. That should be divided into two sentences.

1574394
#lostdarkstellan
I'm soo sorry but I'm not sure understand what you mean

#Rail
Same thing here

1612214 He means this:

Meet four non-ordinary personalities on the biggest adventure of all time, Stellan, Rail, Green, and Kalos as they set sail on the ship The Forgotten One toward a cavernous part of Equestria in search for answer to one of Celestia's many curiosities.

Run-on sentences are two different clauses (complete sentences) following each other without the right punctuation and capitalization. You don't do it but you lacked some words that would complete the overall structure of your summary.

Correction: Meet four non-ordinary personalities on the biggest adventure of all time, Stellan, Rail, Green, and Kalos as they set sail on the ship known as The Forgotten One toward a cavernous part of Equestria in search for answer to one of Celestia's many curiosities.

Sincerely signed,
The "Eclipsed" One
Raine Moon

1612500
#lostdarkstellan
I really don't know how thanks you for that .

but the fact is, thanks you very much for your help

1574394

and thanks you too for your help

1612689 The pleasure was all mine.