AdJunction is an online classified advertising platform that helps people buy and sell goods and services. The site promotes free ad posting and access to a broad audience, with listings organized by category and location. Users can browse offers or create listings for cars, motorcycles, bicycles, scooters, mobile phones, computers, electronics, furniture, clothing, property, and household items. The marketplace also includes business opportunities, jobs, education, hobbies, pets, musical instruments, books, and sports equipment.

Beyond products, AdJunction features listings for services such as travel, electronics repair, health and beauty, home renovation, cleaning, legal documentation, and moving. Real estate sections cover homes, offices, land, rentals, and related agents or builders. The platform provides account registration and login, search and category navigation, and paid subscription plans for users who want to post more ads. These plans range from individual packages to business tiers with different listing limits. AdJunction presents itself as a place to discover local deals and connect buyers with sellers across the USA, while its listings and category examples also include locations in India.