Hello Friend,

Content is king in SEO. If your website content indexed before other site than you don't take tension because google is penalize that site who copy content from your website.

Thanks

Yes, Duplicate date will effect your search engine ranking and your site will be count as a spam site if you are using all ready publish date of another site and this kind of site will never list on first page of any search engine so we should always use unique and high quality relevant content for your site.

Yes, it can be considered a spammy thing. Content should be uniquely created good result in search engine results page.

Yes, if you are using copy content for your site which already published on another site then your site ranking automatically will be down and you will loss your all the traffic on the internet for your site and Google will banned your site on search engine.

It impact on the website who Copied the post . it has no impact from where he is copied the post .

Use these two plugins

Easy Tynt
Tynt Insight for WordPress

They will mark your site as the original poster and if anyone copies your content the plugin will embed a link back to your site no matter where it is.

So now Google will not only know who the original poster is but now you will build backlinks every time someone stills your content.

Hope this helps

Duplicate site content is very harmful for your website to get good ranking in google search results pages. you should delete all duplicate content immediately.

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