OK. I'm going to go full MN here but this is what I'd call a deep clean, room by room:
Remove cobwebs
Dust shelving and all surfaces
Clean windows and frames
Wipe walls where necessary
Dust and wipe skirting boards
Vacuum, including under furniture (pulling out where necessary)
Mop floor (and scrub into corners/spot clean stains)
Spot clean carpets
If a bedroom:
As above, plus: make bed
If a bathroom:
As above, plus:
Use timescale remover on interior of sink/loo/shower/bath and tiling, then rinse as necessary
Wipe down exterior of sink, shower, bath and loo (paying particular attention to behind the loo and sink pedestal)
Use glass cleaner on mirrors and exterior of shower
If kitchen:
As above, plus:
Wipe top of kitchen cabinets
Empty cupboards/drawers and wipe clean
Clean out fridge, defrost freezer, wipe clean
Clean sink with timescale remover
Clean hob
Clean oven (including shelves, grill and door)
And now that I've described what a deep clean is to me, I'll go on to say that I have two very small children and that I have never deep cleaned my current house from top to bottom in one go (or even in one weekend)! I fire fight and focus on specific areas as and when necessary and try to stay on top of the basic tidying and 'maintenance cleaning'.