What does "marriage" mean to you, and what's the moment(if there is one) you think would make you decide you want to marry the person?

Okayyyy
I’d like to say in advance that this is a little bit personal, and i just realized it less than 2 hours ago, that my parents already had no feelings for each other since like 4 years ago.
And I didn’t realize it until now, and
I’m just a little disoriented and chaotic right now.
Same feelings before?
For the record, I just googled and it turns out nowadays the rate of divorce in the most advanced city here is 30%, which should be considerably higher than my city. It feels very rare to me, though. One day ago I would say my parents had a pretty happy journey and very nice bonding together.
Sooooo,
I’m curious that, no matter you are single, partnered, divorced , married or other states, there must be an idea from you about the time when you would decide you want to marry someone, even if just a vague image. So what is it? What do you think would made you think/ realize/ believe that “This is the one I want to marry”?