The phrase "certain genres" refers to specific types or categories of things like movies, books, or music. It means that only particular kinds or styles are being referred to, not all of them. Full definition
Most indie publishers will succeed if they have a long term strategy of consistent publishing in certain genres for certain audiences. (indiekidsbooks.com)
It seems like certain genres of indie games will keep coming up, twisted into new variations and plays on common concepts. (thatvideogameblog.com)
I think this will be a big thing for certain genres like sci - fi and fantasy. (davidmarkbrownwrites.com)