na-adjective, noun which may take the genitive case particle 'no'
bargain; good value; economical
Describes something that offers more benefit or quality than its price suggests; often used in promotions, shopping, and everyday recommendations. The prefix お adds a polite or friendly tone.
このセットは単品で買うよりお得です。
This set is a better deal than buying the items separately.
お得な情報を見つけたら教えてね。
Let me know if you find any good deals.
Formed from the honorific prefix お (o-) and 得 (toku, 'profit, advantage'). The combination yields a polite, friendly term for something that is a good deal.