A sane starting point for whatever's loaded in the printer, before you start tuning.
PLA
Nozzle temperature
190–220°C
Bed temperature
50–60°C (works unheated too)
Print speed
40–60mm/s
Cooling fan
100% after the first layer
Bed adhesion
Clean bare glass or PEI is usually enough. A glue stick helps on tricky first layers.
Worth knowing
Softens around 60°C — not for anything that sits in a hot car or near a heater.
Lowest warping risk of any common filament — the forgiving default.
Starting ranges, not guarantees — your printer, hot end and this specific spool all shift the right answer. Start in the middle of each range and tune from there.