appeal; persuasive power
Used especially in marketing and advertising to describe how strongly a product, message, or advertisement attracts and persuades consumers.
This advertisement has strong appeal and attracted the interest of many consumers.
We revamped the packaging design to increase the product's appeal.
アピール is a broader term for making an appeal or emphasizing a point, whereas 訴求力 is a noun describing the inherent persuasive strength of something.
Compound of 訴求 (そきゅう, 'appeal, solicitation') and 力 (りょく, 'power, strength'). 訴求 itself is a Sino-Japanese word combining 訴 (そ, 'to appeal, sue') and 求 (きゅう, 'to seek, request').