There are a number of ways to do keyword research as part of your search engine optimization strategy.
You also want to do keyword research when blogging. In other words, create blog posts topics that match what brides and grooms are searching for.
Here’s a relative newcomer with a tool that we found worth taking a look at.
It’s called Answer the Public (http://answerthepublic.com/)
Weird name, weirder “guy” they use in their branding, but we found it a good site to help us identify potential blog content ideas and subsequent blog titles.
Our examples here were for the terms: wedding planning and chicago wedding
Realize that none of the keyword research tools you find are anything you’d bet your life on (or even lunch!). That said, cumulatively they do offer good data.