Core Web Vitals are a subset of Web Vitals that apply to all websites and will appear in all Google products. It aims to provide unified guidelines for quality signals that are critical to providing a great web experience.
The browser cache is a folder on your hard drive where your browser saves things it has already downloaded in case they are needed again in the future.
The connection timed out error isn't a dangerous error, nor is it an infected file that can harm your computer. This message primarily serves as a warning that the system has been unable to establish a connection with the server.
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