Lighting control systems are all about making life easy.
Let's say you have a large living / dining area. Room lighting circuits could be, two ceiling groups, wall lights, two pendent lights, book case lighting and table lamps. To control this you could have a large plate on the wall with seven rotary switches which would take you a minute or two to dim all the lights to your desired levels each time you want to change them or a lighting control tiny keypad with five scenes. These could be marked Bright, Dining, Watching TV, Reading and Off. Pressing any scene button would instantly dim all lights to your programmed levels.
Changing scenes couldn't be easier either. On your iPad or Phone simply select room, select scene button, adjust sliders and press save.
If you expand this principle across all your home you can simple add features like "all house off" when you leave the property or go to bed, home scene turning on multiple rooms when you arrive home, movement sensors for bathrooms and toilets, Astro clock to turn lights ON / OFF at dawn and dusk or holiday modes which track how you use your light and then replay this when you are away, giving perspective intruders the illusion you are home. This works really well when combined with opening or closing electric blinds.
Lastly you can combine all the above with other technology in your home. So for example you could raise or lower the volume of ceiling speakers from the same keypad or voice activate your lighting scenes via Alexa or Google Home.