In order to differentiate ads from those of competitors, advertisers should:
- Include prices and promotions
- mention competitor offers and prices
- use exclamation points and words in all capital letters
- use special character, such as asterisks or hashtags
People often use Google search to make a decision about something. Give them what they need to decide. If you have a limited-time discount or stock an exclusive product, say so. To effectively reach potential customers, your text ads should be specific, relevant, attractive, and empowering. you must include prices, promotions, and a call-to-action in order to differentiate ads from those of competitors.
You can read more here: https://support.google.com/adwords/answer/6080580?hl=en&rd=1