SSJS
Server-Side JavaScript for CloudPages, Automation Studio and advanced logic.
Resources
Salesforce SSJS Syntax Guide
FreeOfficial Salesforce guide to Server-Side JavaScript syntax for Marketing Cloud Engagement.
HowToSFMC
FreeCommunity-driven Salesforce Marketing Cloud resource focused on practical solutions to common implementation and development questions.
Gortonington
FreeTechnical Salesforce Marketing Cloud blog and resource by Greg Gifford covering development, architecture, scripting, and practical SFMC solutions.
SFMC.Quest
FreeTechnical Salesforce Marketing Cloud resource by Rafał Wolsztyniak focused on AMPscript, SSJS, SQL, APIs, and development practices.
AMPscript.xyz
FreeSalesforce Marketing Cloud technical blog by Ivan Razine with practical content around AMPscript, SSJS, APIs, and CloudPages.
Salesforce Stack Exchange
FreeTechnical Q&A community for Salesforce professionals, including a large archive of Marketing Cloud questions and answers.