The Samsung S24 Ultra doesn't have a specific functionality to circle anything while browsing the web. The ability to circle or highlight something on a screen would typically depend on the software of the device (like a drawing or note-taking app) or the support of the web browser. If you're using a digital pen like the S-Pen from Samsung, it's possible to capture screenshots and then annotate on them by circling or highlighting. Please note that the 'S24 Ultra' doesn't seem to be correctly referring to a product in Samsung's lineup. If you have more information, we may be able to give a more precise answer. Samsung does produce the S20, S21 Ultra phones, and S24 series monitors.