To gain subscribers on YouTube, consistency, quality, and engagement are key. Start by creating content that resonates with your target audience and provides value. Maintain a regular upload schedule to keep your subscribers engaged and coming back for more. Optimize your videos with compelling titles, thumbnails, and descriptions to attract viewers. Interact with your audience by responding to comments and messages, fostering a sense of community. Collaborate with other YouTubers in your niche to expand your reach. Lastly, promote your channel on social media and utilize SEO techniques to improve visibility. Remember, building a subscriber base takes time and dedication.