Samsung
Delete Cookies and Site Data in Samsung Internet auf Samsung
Samsung Internet stores cookies and site data for every page you open, even when you are just briefly logged into a shopping or social site. Over time this data piles up, causing personalized ads to follow you across unrelated pages or login sessions to behave inconsistently.
The setting responsible for this lives inside the browser itself, not in the general Samsung One UI settings menu. You clear it through: Tap on Internet ➔ Open the Menu ➔ Tap on Settings ➔ Tap on Personal data ➔ Tap on Delete browsing data ➔ Select Cookies and site data and tap Delete.
This removes stored login recognition and tracking identifiers, so you may need to sign in again on sites you visit often. It does not delete saved passwords, bookmarks, or downloaded files, since those are stored in a separate part of the browser.
If pages still load slowly or ads still feel oddly specific after clearing cookies, check whether Delete browsing data also offers an option for cached images and files. A full cache reset sometimes clears up issues that cookies alone do not fix.