Dating with no intention to marry
First and foremost, dating is a time when a Christian finds out if his or her potential marriage partner is also a believer in Christ.
The Bible warns us that believers and unbelievers should not marry each other, because those living in the light (of Christ) and those living in the darkness cannot live in harmony (2 Corinthians -15).
Courtship takes the position that the two people have no physical contact at all (no touching, no hand-holding, no kissing) until marriage.
I don't want to date more than one guy at a time, but I might not want to marry that one guy, either. These terms are often used interchangeably, depending on which one the person feels most comfortable using. You never hear a non-Christian use this term at any time.
So courtship, just as a term, has meaning and value to a Christian.
Many in a courtship relationship will not spend any time together unless family members, preferably parents, are present at all times.
In addition, courting couples state up front that their intentions are to see if the other person is a suitable potential marriage partner.