Well there is kinda two answers for this one.... 1) a connection is when you can feel like yourself with someone and you somehow know that your safe. You can talk about anything with this person. But you kinda just know. I know it sounds kornie and stupid. But thats how it is... Sorry
2) connections can totally go polar opposite because when your older. When your on a date with a guy. ( guys don't take it personally its just an example girls can do it too) they can say "I have such a good connection with you!" and then leave your but with the bill because he knows that the girls will be happy just because he said they have a "connection" and they may take advantage of you. And make you do pretty much whatever they want. && then they can go dump your ass and make you feel bad for it.
2) connections can totally go polar opposite because when your older. When your on a date with a guy. ( guys don't take it personally its just an example girls can do it too) they can say "I have such a good connection with you!" and then leave your but with the bill because he knows that the girls will be happy just because he said they have a "connection" and they may take advantage of you. And make you do pretty much whatever they want. && then they can go dump your ass and make you feel bad for it.
so just be-careful who you think you have a connection with. Hope this helped!