In the series of my favourite trailhead module blogpost this time, I’m going to cover about one of the most expected and important developer focused trailhead module “ Apex Integration Service ”. This time salesforce launched with new a Trail and 6 badges which brings over all 13 trails and 70 shiny badges in the Trailhead. Most of the salesforce projects will have an integration with the other application in the project life cycle. As a salesforce developer, we must have a sound knowledge in Integrations and salesforce provides this free “ Apex Integration service ” trailhead module which has 4 units with the followings topics Apex Integration Overview This overview module makes you understand the difference between the Webservice and HTTP callouts and use of external site in Webservice topic salesforce Apex REST callouts This module covers the both consuming and sending data through REST callouts. You will learn about the Deserialize and serialize JSON strings in ap