Social Shorts: Snapchat advertiser certifications, YouTube masthead ads go full CPM, more

The social media marketing week in review: A round up of news and announcements you may have missed.

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from Search Engine Land: News & Info About SEO, PPC, SEM, Search Engines & Search Marketing https://searchengineland.com/social-shorts-snapchat-advertiser-certifications-youtube-masthead-ads-go-full-cpm-more-343720