You may have noticed recently that some Hubs on HubPages are showing up without summaries. As a part of our overall effort to improve the reader experience on HubPages, we are encouraging everyone to create their own, custom summaries.
The summary you enter (under the summary tab of the control box at the right side of the HubTool) will be used as a hidden “meta description” tag- something many search engines and web services use as summary/preview text for your Hub.
A well written summary could be the deciding factor between a potential reader clicking through to your Hub or moving on, so interesting, well-written, original summaries are worth the little bit of time they take to write.
I recommend you make a habit of writing up a quick summary for each Hub before you publish. It adds some extra polish to the Hub and encourages other people to have a closer look at your work!