At least the existing keywords mainly referring to the same ones & when using those than typing new/custom ones ...also being sure that no section being duplicated e.g. category vs. game's title, description, etc. and I like publishing short stories with optional elements, while its tags being limited to 10 anyway. It would be easier for selecting them or getting a "favorite"/bookmark-menu to summarize my used ones and finding them than retyping them for each game.
I don't publish games "that often", still when having to pre-type each keyword first, I tend to get its itch-theme fixed, saving it next to font and colours, descr., banner and later updating this draft with the actual file. I'm still amazed by the options of chooseable tags e.g. programs that being connected for designing it. Or credits of users, same as: download or webgame, etc.
So the "searching for games or creators"-placeholder probably sounds more fitting if there's just "browsing for keywords" being mentioned, I guess? Searching for my nickname gets it visible, so browsing for profiles works there.