I have the same question about inserting parentheses for a keyword like this: (Cannabidiol)
I do believe Google bot can crawl and index correctly the word "Cannabidiol" even if it's inside parentheses and even if it's a meta tag (title or description). Is there anybody who could test this by optimizing a page with a focus keyword used in parentheses and had good ranking for that keyword (without parentheses)?
Thanks
