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I'm thinking of starting a new blog, but when I did my keyword research I found that my keywords all have low search volume (under 100 searches per month, with the occasional keyword having 480 searches a month). Is this a deal breaker? Any recommendations would be great - thanks everyone!

So I know you can use dashes and | in meta tags, but can anyone tell me what other punctuation you can use? Also, it'd be great to know what punctuation you can't use. Thanks!