In short, these sites have lots of people and many useful tools for matching, but it’s your responsibility to make your faith a key component of these matches.
On the one hand, they make faith and morals central to the process of matching.
They facilitate both talking and learning about the faith.
First, they provide a large pool of potential matches and they all have a large number of Catholics present on them.
Second, they all have ways of indicating how important your faith is to you and matching you with people based on this characteristic.
There are two basic types: general dating sites that have large numbers of people and those that are specifically Catholic dating sites.