Roleplaying
Roleplaying is fairly simple. It's exactly like what it say- Roleplaying. You step into the role of another character, and in this case, the role of a cat. You type up posts, in a story format, but you won't be the only one writing. Other people have their own characters who they will be roleplaying. Your cat will usually be in a clan if you are rping warriors. People usually prefer it is you write in third person, when you don't use the words, "I" and "You." You should use "He" "she", or the characters name. Heres and example.
I would post: 'Badgerstar narrowed her eyes, sending the ginger warrior an unfathomable gaze. Behind the two cats rested a twoleg house. It was rundown, but still occupied by a twoleg.
"Spellmage, what were you doing there?" she growled.'
They might reply: 'Spellmage felt her insides curl in brief uncertainty; was Badgerstar doubting her loyalty? The ginger she-cat flinched, and for a fleeting second she felt cornered.
"I was only patrolling. I thought I smelled a Thunderclan warrior, but it lead to the twoleg house. I only went to follow the scent," she lied breezily. Her tail twitched vaguely.'
I would post: 'Badgerstar tapped her claws against the pebbles, brow raised.
"Why were you patrolling alone? any of the cats in Shadowclan camp would have willingly come on this patrol," she meowed lightly. She was eying Spellmage suspiciously. 'She's lying,' Badgerstar thought grimly. 'I can tell...''
They might reply: 'I wanted to go alone. Thats not against the warrior code, is it?" Spellmage narrowed her eyes and turned on the spot. Long tail streaming out behind her, she loped in the direction of camp, leaving Badgerstar in the clearing.'

Thats an example of roleplaying, but usually they will go on much longer.