These were the biggest marketing moments of 2017

From ad misplacement and fraud to sexism in commercials and alleged harassment in Hollywood, it was quite a year for the marketing and media industries. CNBC takes a look at the past 12 months.

January — The world's largest advertiser slams 'crappy advertising'

January 2017 saw Procter & Gamble PG 's Chief Brand Officer Marc Pritchard calling on the media buying and selling industry to become transparent in the face of "crappy advertising accompanied by even crappier viewing experiences." He gave agencies a year to get to "a transparent, clean and productive media supply chain," or risk losing its business . This set the tone for the rest of the year with ad fraud being reported as a widespread problem.

February — PwC is the Oscars biggest loser

And the loser is … accounting firm PwC for the envelope mix-up at this year's awards that saw Faye Dunaway mistakenly announce "La La Land" as the winner of the best picture Oscar, rather than the actual winner, "Moonlight." It will continue to work for the Oscars, but with no cellphones allowed backstage.

March — YouTube apologizes for ad misplacement problem

Brands including HSBC HSBA-GB , U.K. retailer Marks & Spencer MKS-GB and L'Oreal OR-FR pulled advertising from YouTube in March, after their ads appeared next to extremist content. "We've got a comprehensive review under way — we have for some time — looking at how can we improve here and we are accelerating that review," Google's EMEA president of business and operations told journalists at a briefing at Advertising Week Europe in London. It then hired "significant" numbers of people to tackle such content .

April —Tencent is set to become a more valuable brand than Facebook

China continued its rise as a technology powerhouse, with Tencent 700-HK becoming the first Chinese brand to top the $100 billion mark , according to the BrandZ ranking of the most valuable brands in the country. When BrandZ's global ranking was published in June 2016, Facebook's brand value was $102.6 billion, so Tencent's value of $106.2 billion suggests that it is now competing on a global scale.

May — Facebook and Google are declared the world's largest media owners

Google GOOGL and Facebook FB together took 20 percent of the world's advertising budget across all media in 2016, according to media agency Zenith's Top 30 Global Media Owners report. It listed Google's parent company Alphabet GOOGL at number one, making $79.4 billion in ad revenue, followed by Facebook, which earned $26.9 billion.