Sure. The main advantage of using the plugin is that you can display those page feeds on your own website, rather than just listing a link which users may or may not click on to view them on Facebook. The same reason why someone might want to display their twitter feed on their website, or show a list of their latest blog posts on their home page. It just consolidates the different information feeds into one central location – which in this case is your website – saving the user from having to hop from one site to another.
If you have upcoming events which you’ve posted on Facebook that you want to list on your website to encourage people to attend then you can do this, or if you want to create a gallery on your site of your most recent photos or videos then you can do this too. There’s a ton of ways that you can use the plugin to integrate your Facebook page content into your own site.
You can use a default Facebook widget in order to do this, but it doesn’t allow you to customize it’s appearance/branding, filter out certain post types, choose different layouts etc etc. The default Facebook plugin also only loads in the content via JavaScript which means that it isn’t crawlable by search engines.
John