A steps indicator shows the stages of a task and highlights the one someone is doing now. It is like a row of signposts on a walking route: people can see what they have passed and what comes next.
An online order form might show Delivery, Payment, and Review. This helps people understand that the form is a process rather than one long page.
Use short labels and mark completed, current, and upcoming stages clearly. If the task has only one or two simple parts, a step indicator can add clutter instead of helping.