What type of action can be used to perform conditional logic within a flow?

The "Decision" action is specifically designed to implement conditional logic within a flow in ServiceNow's Flow Designer. This action allows you to evaluate certain conditions and then direct the flow's execution based on the results of that evaluation. By setting up conditions within the Decision action, you can create multiple pathways within a flow, ensuring that specific actions are triggered only when certain criteria are met. This capability is essential for managing complex workflows where different outcomes are required based on varying scenarios.

In comparison, other options like an "If Condition" action do not exist as a distinct component in the Flow Designer framework, which may lead to confusion. "Conditional Task," although it sounds relevant, focuses more on task assignment based on certain conditions rather than controlling the flow's direction based on logical conditions. "Branching" does relate to creating separate pathways in a flow but is not the formal term used in ServiceNow for the action that evaluates conditions. Therefore, the "Decision" action is the correct and appropriate choice for implementing conditional logic in a flow.