Many organisations are finding maps and spatial apps to be an effective way to communicate with partners, customers and the public. ArcGIS Online is well suited to supporting this use case. Using this scalable, hosted system you can be confident that your maps will remain accessible regardless of demand and even if the usage exceeds your expectation there won't be an impact on your internal GIS capabilities.
If you have several maps or apps that you'd like to show as a group there are a couple of ways you can do this. ArcGIS Online has a gallery application template, which lets you choose a suitable layout, that can be used as a self contained webpage. Alternatively you can embed a map gallery in your website, as we've done here. You can read more about how to do this in this blog article.