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E.g. if my mail is on job application, the Sponsored Ads I might see are Naukri.com, Monster.com, etc. in India.
Yes, Gmail is definitely showing *thematic* ads. Whether Gmail is reading the emails or not is a controversial matter but anyway, the ads Google shows on the right side and top tend to be very relevant to your email context.
ads are totaly contextual as adsense is
Las VegasOctober 6-8, 2015