If you want to get more followers, it doesn’t hurt to let your viewers know that and to actively remind them to subscribe. We all know how powerful CTAs can be, and this is no exception. In addition to urging viewers to “Subscribe!” at the bottom of your description, you can add “Subscribe Now!” CTAs to the end of every YouTube video by adding YouTube elements to the last portion of it.  Previously this could be done with annotations, but that feature has been deprecated. You can do this under the “End Screen & Annotations” tab when you’re editing your video.
3. Upload your channel art — Channel art is the banner/header that appears towards the top of your channel when viewed on a desktop. Upload a large image (2560×1440) with the most important visual elements located in the inner 1546×423 area (so they’ll still appear when the image is scaled for mobile and tablet). See the image below for various display dimensions.
You can choose a feature video from any of your uploads, or create a video specifically for this purpose. I recommend doing the latter; it allows you to create a short video (no more than 90 seconds, preferably) to welcome viewers to your channel and explain what you can offer them. This brief clip may not seem like a big deal, but in my experience it can go a long way in getting people to subscribe. 

Just as the YouTube Creator Academy preaches getting to the point quickly in channel trailers, Brian Dean of Backlinko asserts the first 15 seconds of your video is the ideal portion to optimize. Why? Because viewers will decide within that first 15 seconds whether your video is the real deal. Once you’ve got their buy-in, your video will naturally accrue greater watch time, improving your ranking signals.
These tags serve the same function on your site as they do on your YouTube channel, yet not every marketer places as much emphasis on meta tags as they could. Again, the purpose here is to allow YouTube and Google to index your site for search, so the more relevant, contextual information you can provide, the better. Just remember, keyword stuffing died years ago, so only input tags that add value – don’t go overboard.
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