How can I create a Web map and use it to collect the data using Collector App?
We have a knowledge base article: Creating an Online Map which gives us stepwise instructions to create a new web map. You can use the same web map to collect the new data using a collector app. After creating a web map you need to go to the settings of the web map and put a checkmark in the section where it says ‘ Allow to use in Collector App’.
To better understand the workflow in detail, please go through this article: Create and share a map for data collection.