nugget of information
A particular or singular thing that someone has written or said which is especially informative, interesting, useful, etc. Can also be used sarcastically to imply that what is said is banal, useless, or uninformative. Amidst the rather rambling speech delivered by the prime minister, there was one little nugget of information that voters would do well to keep in mind. This book is a fascinating read, and it's filled with nuggets of information about the war. Thanks for that nugget of information, Jeff. I'm sure sunbathing tips will really come in handy in Iceland!