To send a welcome email to contacts when a contact record is added as a campaign member to a 'Loyalty Member' campaign in Sales Cloud, Northern Trail Outfitters should create a journey with a Salesforce Data entry source and an email activity. A Salesforce Data entry source allows marketers to inject contacts into a journey based on changes or events in Sales Cloud objects, such as campaign members. An email activity allows marketers to send an email message to contacts in a journey. References: https://help.salesforce.com/s
/articleView?id=sf.mc_jb_salesforce_data_event.htm&type=5 https://help.salesforce.com/s/articleView?id=sf.
mc_jb_email.htm&type=5

To take their built audience and serve personalized content based on a field in the data extension without coding experience, Northern Trail Outfitters should use Dynamic Content Blocks. Dynamic Content Blocks are blocks that allow marketers to create personalized content based on rules and filters without coding.
Dynamic Content Blocks can use subscriber attributes or behaviors from data extensions, lists, or journeys as criteria for displaying different content blocks or images. References: https://help.salesforce.com/s
/articleView?id=sf.mc_ceb_dynamic_content_blocks.htm&type=5

Explanation
To make sure the decision splits reflect the correct tent for each customer, Northern Trail Outfitters should use Entry Data as the type of data in the decision splits. Entry Data is thedata that is captured at the time of entry into a journey and remains static throughout the journey. Entry Data can include data from data extensions, Salesforce objects, or API events. Using Entry Data will ensure that the decision splits are based on the tent that each customer bought at the time of entry, and not affected by any subsequent purchases or data changes.
References:https://help.salesforce.com/s/articleView?id=sf.mc_jb_entry_data.htm&type=5

To allow for long-term self-sufficiency in segmentation, Northern Trail Outfitters should use data filters. Data filters are a user-friendly tool that allows marketers to segment their data based on criteria and conditions without coding. Data filters can also be refreshed and reused for different campaigns. Attribute groups are used to link data sources in Contact Builder, not for segmentation. Publication lists are used to manage opt-in preferences, not for segmentation. Query activities require SQL knowledge and coding skills, which the marketing team lacks. References: https://help.salesforce.com/s/articleView?id=sf.mc_es_data_filters.
htm&type=5