To get likes on your comments, you need to be one of the first and most valuable responders. Engage with posts from larger pages in your niche as soon as they are published. Your comment should offer a unique insight, a helpful answer to a question in the post, or a thoughtful addition to the discussion. Early, high-quality comments are more likely to be seen and upvoted by others scrolling through the replies.
Frame your comment to encourage agreement or affirmation. Ask a follow-up question within your comment that others can easily answer, share a short, relatable personal experience that resonates with the post's topic, or succinctly summarize a key point that many people feel. Comments that validate the general sentiment of the audience often become the "top comment" that everyone likes.