A shot list is a written plan of the specific images a photographer intends to come back with from a shoot, covering compositions, angles and key moments rather than a vague general intention.
A shot list is what stops a photographer from arriving home with strong frames of the wrong things. On any shoot with time pressure or no second chance, a wedding, a one-day travel stop, a corporate event, it is easy to get absorbed in whatever is immediately interesting and forget a shot that actually mattered to the client or the story. Writing the required images down in advance turns memory into a checklist that gets ticked off under stress.
It also front-loads the thinking: deciding you need a wide establishing shot, three detail shots and one specific portrait forces you to plan lenses, timing and location before the day rather than improvising all of it on site. For predictable events the same list can be reused and refined shoot to shoot, so a missed frame becomes a permanent addition to the template rather than a mistake you repeat.
A wedding photographer's shot list breaks the day into blocks with specific frames under each. Preparation: dress on the hanger, rings, invitation, shoes, the back of the dress being buttoned. Ceremony: the walk down the aisle shot from the front, the partner's face at the first look, the ring exchange, the first kiss wide and tight. Family groups: eight named combinations agreed with the couple beforehand, so nobody important is missed and the sequence runs fast while people are still gathered.
Reception: room detail before guests enter, first dance from two positions, speeches with reaction shots. The photographer also marks which frames are non-negotiable versus nice-to-have, so a running-late timeline sheds the right shots first instead of losing a family group nobody can reassemble. That prioritised list is also what the couple signs off in advance, so any later argument about a missing photo is settled before the wedding rather than after it.