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Hi I would like to ask if it is duplicate content if I place on my website article with pdf attachment-the same pdf attachment is placed on more websites. Worldwide company made article (short article and some photos) with special offer in pdf, this pdf file is placed on more sites. How google handle with this file? Can google read text inside?

I would like to display H1 Title tag invisible on the homepage. I set up Title colour  same  colour as background colour. How google handle with this cloaking? What should I to set up in the style.css?

If I hide H1 tag (title on the homepage) with CSS, how Google handle with my site?

I was wondering if backlinks from foreign language webistes can help me in ranking? For example: I ve got website in slovak language and I would place article with backlink on the foreign language website.  In which language should be the text surrounding the keyword?

Im wondering if article submissions with backlink  work for seo?  How google handle with these submissons? Thanks

Are paid directories held to the same standards as paid links? Is it going to get penalized my website if I submit website to paid directory?