YouTube likes have an important role in promoting your YouTube Video. As more and more people like your video, other Viewers will also encouraged to watch your video. Viewers can either Like or Dislike your videos. If there is large number of viewers that like your video, you are more likely to appear higher in YouTube search engine as it gives higher priority to the video that has good number of Likes.
Increase the reputation of your YouTube video by increasing the number of Likes. If you have a higher number of YouTube Likes, people will consider it better feedback towards your video and can give better Ratings to your video.