Final answer:
The E*TRADE baby is an example of the execution style in a message strategy used to communicate the ease and cost-effectiveness of the E*TRADE online trading platform, made to be memorable and concise for effective marketing.
Step-by-step explanation:
The use of the E*TRADE baby to demonstrate how easy it is to use and save money with E*TRADE's online trading platform is known as the execution style of its message strategy. This strategy involves creating a memorable and compelling illustration of the brand's value proposition.
Typically, message strategies like this are cleverly crafted to be concise and impactful, often being distilled down into easily digestible snippets akin to "30-second sound bites" that could be converted into campaign slogans for various marketing materials.