Other forms: taglines
A tagline is the line that sums up what a brand promises. A memorable tagline, the tagline says, change the tagline.
The good ones make a claim rather than a description, which is why they survive decades while the advertisements around them are forgotten. In film it is the line on the poster rather than in the script.
1nountaglineThe line that sums up what a brand promises.
“The ad agency spent weeks on a short tagline to go under the new logo.”
tagline is a line.
Tag plus line, from the tag in the sense of a label attached to something.
From tag + line.
Etymology from Wiktionary, CC BY-SA