The marketing team at Northern Trail Outfitters wants to include a subscriber's local weather conditions...

Personalization strings in Salesforce Marketing Cloud are used to dynamically insert content, such as subscriber-specific data, into emails. For including a subscriber's local weather conditions in the subject line of email campaigns, personalization strings can be utilized to reference the relevant data stored in the data extension used for sending the email. This allows each email subject line to be customized with the specific weather conditions relevant to each subscriber, enhancing the personalization and relevance of the campaign.