Bootstrap is the most popular CSS Framework for developing responsive and mobile-first websites.

A personal website is an online platform that showcases an individual's work, interests, and personality. It can include a range of content, such as a bio, resume, portfolio, blog, and contact information, and is often used to promote one's personal brand or professional services.

A portfolio website is a type of website that showcases an individual's or a company's work, skills, and accomplishments. It typically includes a gallery of images or videos, case studies, and client testimonials to provide potential clients or employers with a comprehensive overview of their experience and expertise.