Transfer windows truly are an educational experience.
From player integrity, club valuation, fan support and team ambitions, there is a hell of a lot to be garnered in the months between the opening and closing of a transfer window.
Like them or loathe them, they are integral in modern day football, and with each passing window we seem to learn a little more about what's considered important in the sport we all love.
This summer's transfer window was no different in terms of entertainment value, and with numerous records being broken, we though there was no better time to list the most important issues to remember.
Whether you're a manager, player or fan, grab your notepad and pen; there's a lot to be taken from the past few months.