In https://spring.io/guides/tutorials/spring-boot-kotlin/ it says that when creating the project we should add the web dependency, but I don't see that in spring boot initializr, is this referring to Spring Web Starter? https://start.spring.io/#!language=kotlin&type=gradle-project

Well, I’m an Android developer not BE. But decided to give a try on servers with Kotlin and had same doubt. You’ll be prompted to choose between different dependencies, but yes, Spring Web Starter is most basic one. There’s a description of what’s added case you need more advanced stuff.