Writs are repeatable quests which rewards status where 10% of status gain is also added to guild status which is how a guild level up.
There are normal writs and then crafting writs, normal requiring you to kill or do something and crafting writs requiring you to, well... craft stuff.
Not that i mind answering, but you might want to remember that this is an ISXEQ2 forum and not a general EQ2 forum

Also the official forums at eq2players.com are a great source of info and if you want to read all about how everyone thinks their main class got shafted and raped by SOE, you can check eq2flames.com
//Ronin