Most churches today have a website. But the majority of church websites are never updated with current church information and news.
WordPress is the most flexible content management system for keeping your church website useful and easy to update. WordPress is easy to learn and use, so you'll be more likely to use it to keep your church website current.
Anyone thinking of visiting your church will likely look for your website before their first visit. Even if it's only to check the service times. I heard of a church recently that had a family choose to visit their church over all the other churches in the community because their website was the only one with easy-to-find service times.