Battery dead
Dead battery or a bad connection to the battery.
The starter solenoid/relay switch is going bad. Eventually, it will just click and not start.
Weak battery Loose or corroded battery cables
you need a new batt.
if there is a single click when you turn the key i would lean toward a starter being bad if there is multiple rapid clicks then i would lean toward a battery
If it "clicks" when you turn the key,it sounds like either a weak battery of bad starter selenoid.
sounds like the battery is dead, take the battery to a shop that can load test it
Check to make sure you connections are all tight.
Could be the starter or ignition switch...does the car crank/turn over when you turn the key? If you just turn the key and it 'clicks' it might be the ignition switch. I've had this problem before, and it ended up being the alternator. HOpe this helps!
I would check your charging system. If you turn over your key and your starter just clicks, it is usually a low battery charge or your starter is out. I would suggest jumping off your vehicle and taking it to autozone and have them do a charging test for free.
Your battery is dead. Turn your lights off next time.