Marketing Copy Tone & SEO Audit

I have a set of marketing pieces aimed squarely at young adults, and I need a fresh, expert eye on them. Grammar has already been checked; what I’m looking for now is a focused audit of tone, style, and overall SEO strength... (Budget: £250 - £750 GBP, Jobs: Content Strategy, Copywriting, Digital Marketing, Internet Marketing, Keyword Research, Marketing, Marketing Strategy, SEO)