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Hey Paul, there is another good one out of Calgary, Alberta. They are called Alberta SEO.

https://www.seoalberta.net

I've used them in the past for link building campaigns and they always do a great job. Links are always clean.

Does having an HTML page in a PHP website affect SEO? I have a PHP website but one of my targeted pages have an HTML page. Will it cause any harm to the website or is it fine to have a html page in a PHP website?