The biggest thing, first and foremost, that I want to see when I hit a Parish website is the Mass times for Sundays, weekdays, and Holy Days of Obligation, and also the confession time. And I’d like this to be in a very obvious place like on the front page, and easy to locate.
This sounds like a no-brainer, but you’d be surprised at how many parishes have this buried in some obscure spot and instead have on their front page big pictures of people from their church, or their youth group etc., something that is no doubt very interesting to parishioners but does not give the basic information to a person who just landed from out of town and is looking to attend a Mass or confession ASAP.
The second biggest thing I would like to see, if your parish offers it, is Eucharistic Adoration times, and please make them be correct. Again, many parishes do not have this information in any easy-to-find place, or worse yet it is out of date, so you arrive and find the Adoration is not going on or the chapel is closed, etc.
The third thing that would really help is a Parish Calendar that actually includes everything happening and is kept up to date. It seems like churches either do not have these at all, or do not keep them up to date, so many parish events including Lenten fish fries, Flame of Love Cenacle prayer groups, even the daily Rosary, are not listed on the calendar, or anywhere. Again, this is probably not a problem for the regular parishioner, but websites are also going to be serving people in the neighboring parishes and even from further away who want to visit your church.
Finally, I really appreciate it when parishes put the special events happening within the week or two right on the landing page, so I can see if there is something like a play, a fish fry, a 40 Hours Devotion, a retreat weekend, etc. happening. I often go to these things, but a lot of times the parish is not good about publicizing them on the Internet - you have to go to the church in person and see a paper schedule or a poster or a paper bulletin. These are also good things to post on the parish Facebook. Too many parish Facebooks only have pictures of events after they take place, which again is nice for the parishioners getting to see pictures of their friends, but not helpful to those of us who have wanted to go.