An important step in managing and promoting a YouTube channel is to add the right channel keywords.
Keywords can indeed help users to discover your YouTube channel when they make searches on Google, YouTube and other search engines. So the first step is to choose the keywords that specifically represent your channel and the type of content published.
Once done, sign-in to YouTube, click on your profile picture displayed at the top right corner > Creator Studio > Channel > Advanced:
Type your keywords in the Channel Keywords field and then click on Save:
Separate your keywords with a space and use quotation marks when search terms are in the form of short phrases.