Dd's school wants parents to get involved to encourage a sense of fun/community outside the academic side of things.
They want parent volunteers for Autumn Festival, annual Art Show, drama performances (usually help with costumes, makeup and props), second hand book sales/baked goods sales, etc. Many events are aimed at raising funds to buy non-essential equipment that enhances school life.
Other volunteer opportunities are aimed at helping the teacher (photocopying/collating hand-out materials for class, assembling materials for class projects, etc), or organising class parties for various times during the calendar year (book day/ Halloween/Valentine/end of year parties/Summer Fete, etc).
I realise it is difficult for parents who work full time in office jobs to volunteer, and accept that childcare can be tricky for those who have other dc to juggle. But, am starting to feel a bit of a mug, because it is almost always the same core group of us who roll up our sleeves and muck in when the call for help goes out. It seems reasonable to think that even the busiest parent could drop off some baked goods for a class party (even if store bought)....
As a single Mum (with no family or financial help), I am busy too. But I make time because I think it is important to contribute in some way to the school community when asked.