In Canada most of that is pretty opaque. Electricity tariffs are not really something that most households would worry about. Businesses and Industrial usage do though
You can base it on the wholesale price, great if you have battery storage
https://octopus.energy/smart/agile/
Or just an overnight rate
https://octopus.energy/smart/intelligent-octopus-go/
Again if you put in a £5k 10kWh battery you are golden, as you put 8kWh into your car and 8kWh into your battery every night, dropping your electric cost to £38 a month (plus the standing charge, which is far higher)
Many people choose a single fixed or variable rate tariff, but there are also off-peak tariffs that are very cheap at night but slightly more expensive in the day (designed for EV users), or even tariffs where the rate changes every 30 minutes depending on what is being generated - in this case when there is excess solar and wind generation then sometimes the rate even goes negative and you are paid to use the excess power.
Most places I lived had this set up.
(Nowadays smart meters offer many more options.)