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.
Many user interface tools allow you as a designer to access, refine, and create a well-crafted user interface. Here is the list of 16 tools under different categories for web designers so that they can achieve their design goals.