Inteligent Go is only available to EV drivers with certain cars or chargers.That’s a wide range, what is required to take advantage of the two lower priced tariffs. Are they geared to having solar and or battery storage. Otherwise why would anyone choose the more expensive tariffs.
Use the menu to click on "Tariffs at a glance" for an overview of the tariffs available.
Agile is open to anyone, but exposes you to 30 minute variable market rate pricing . If you have some way of load shifting away from the peak price times (16:00 to 20:00 - @GUMPY will correct me) then you can take advantage of very low and even negative costs where you are paid to use electricity.
Tracker is open to anyone, has a moving daily price, and can save you lots - that is seriously worth exploring.
Octopus Cozy is a time of day tariff designed for heat pumps. My time of day usage is totally off line with that tariff so it looks very expensive.
There is a dedicated tariff for battery owners - Flux - which also is focused on time shifting.