I have put a google review and does not work in the internet 
Автор: Teo F.
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www.pcshop.com.gr
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When I click on the link at the bottom of the home page, I get this message:
"For your protection, consent.google.com does not allow Firefox to display this page if it is embedded in another page. To display the page, it must be opened in a new tab."
I found this information in German (translate it with Google), not tested.
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Integrate Google reviews on website: 4 possible ways
See German link below.
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Google Bewertungen auf Website einbinden: 4 mögliche Wege
German >> https://www.digital-lokal.de/blog/google-bewertungen-auf-website-einbinden/
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Автор
https://g.page/r/CRJhWkubTbcsEBM/review
i have put this link to my website and does not work
The link probably doesn't work in a showbox. Open it in a new window or in a pop-up window.