Breadcrumb Trail & Schema shows a clickable trail such as Home > Services > Plumbing on the pages you choose, and adds matching structured data for that trail. You write the trails yourself in a simple table: the pages a trail is for, such as /services/*, and the steps with a name and the page each one links to. The last step is the page the visitor is on, so it is not a link, and you can let it use the page's own title. The first trail that fits a page is used, and pages with no trail get nothing.
You choose the name of the first step, the separator (>, /, | or an arrow), text and link colors, text size and position. Long trails fold the middle steps behind a small button that opens them, and everything wraps neatly on a phone. It is a proper navigation list with the current page marked for screen readers.
Place it in a box you name or just above your footer, and exclude any pages. Honest by design: the app does not read your site's page tree, does not guess trails and does not fix your site's own menus. Search engines may take time to notice the structured data, or may not show it. Up to 40 trails with 8 steps each. It collects nothing about visitors.