Which feature is commonly associated with LinkedIn?

LinkedIn is primarily recognized as a platform designed for professional networking. It serves as a social media site where individuals can connect with colleagues, industry professionals, and potential employers or clients. The platform facilitates the building of professional relationships, allowing users to share their work experience, skills, and achievements, thereby enhancing their career visibility and opportunities. Users can engage in networking with others in their field, join groups related to their profession, and participate in discussions that can lead to new business opportunities or career advancements.

While the other options do not align as closely with LinkedIn's main purpose, photo sharing, blog writing, and event planning can be seen in various forms on different platforms but are not the core functions of LinkedIn. The platform's focus on career-oriented activities makes it a unique tool for those looking to advance their professional lives.