For a hub to get featured, it would help to follow the "need some goals?" located at the top of any hub in edit mode. This includes having a lot of text, at least 3 images and even some polls or quizzes or videos.
Images you use in your hubs should be properly attributed and copyrighted photos should not be used. Only photos that can legally be used should be in your hubs such as those in the public domain, those that have the creative commons license and those that are your own photos.
Any products or links you have in your hub should be related and relevant to whatever your hub is about.
These are just some of the criteria for a hub to be featured. To find out more information, check out the HubPages learning center guide on this topic. Here's the link: https://hubpageshelp.com/content/Learning-Center-E... . Hope this helped.