I took my paper to a journal to get it published but they have asked me to first add some keywords to make it accessible all over. They said it would only be beneficial for me. But I have no idea what sort of keywords I should add? From where I will get them? Please suggest me the sources guys.
There are many journals who ask for keywords.
Keywords are something that is directly related to the idea and concept of the research paper. It would help the users to refine search and find your article in that journal easily.