A few examples for workflows which you can do with Power Automate are
Automate business processes
Send automatic reminders for past due tasks
Move business data between systems on a schedule
Connect to almost 300 data sources or any publicly available API
You can even automate tasks on your local computer like computing data in Excel.
In this post, let us see how we can update the Multichoice field in the SharePoint list using Power Automate actions. We will update the field using the out-of-box Create Item action.
Focus on the Flow
The scenario is by creating an item in List B when an item in List A is created or updated. Both the lists have the same fields listed below
Title - Default field
Sample Choice - Multichoice field, internal name is SampleChoice
Let us start designing the flow 1. Create an automated flow, give a unique name to the flow, and select the trigger named 'When an item is created or modified' as shown below 2. Choose the Site Address and List A for the List Name property 3. Add an action 'Initialize Variable' and provide the properties as mentioned below. This variable will store the choices from an item from the source list.
Name - Choices
Type - Array
Value - 
4. Save flow. 5. Add an action 'Apply to each' and provide the input as "triggerOutputs()?['body/internal-name-of-the-choice-field']". In our case the internal name is 'SampleChoice' 6. Add an action 'Append to array variable' inside the 'Apply to each' action. Provide the following properties for the append action.
Name - Choose the initialized array variable
Value - items('Apply_to_each')?['Value']
7. Add an action 'Select' after the 'Apply to each' and not inside the 'Apply to each'. 'Apply to each' must have only one action inside the loop. Provide the following properties to the 'Select' action.
From - Choose the variable Choices
Map - Value in the first column and item() in the second column
In order to update the multichoice value to the item field, SharePoint expects the input argument in the below format, so we have to define the structure using the 'Select' action.