The board, chairman and fans want possession based attacking football, and this tactic gives you exactly that. Moving the ball around quickly and fluid will excite the fans and bring your team an attractive style of play.
Give the tactic a try and leave a comment as to how it has worked for your Arsenal side. Also, let your team get familiar with the tactic before it works to full effect.
The video below is an in depth guide as to how the tactic works.
You might also want to check out the written team guide to Arsenal for FM15 by J_Skinna_39.