An embedded reporter or journalist, such as a war reporter assigned to and travelling with a military unit, or a political reporter assigned to follow and report on the campaign of a candidate.
An element of an advertisement, etc. serving as a subliminal message.
verb
To lay as in a bed; to lay in surrounding matter; to bed.
“to embed something in clay, mortar, or sand”
(by extension) To include in surrounding matter.
“We wanted to embed our reporter with the Fifth Infantry Division, but the Army would have none of it.”