As of March 2nd, 2020, the Instagram platform will be deprecating its API. This will directly affect the Instagram feed section in all WordPress & Shopify themes. Read more on how it affects your theme here: https://fuelthemes.net/important-notice-instagram-feed-removal/

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Adsense codes do not work in Advertisement textareas

Adsense codes do not work directly in post editors. For that you'll need to use a plugin like https://wordpress.org/plugins/wordpress-plugin-for-simple-google-adsense-insertion/

More plugins compared here:

http://lunarpages.com/uptime/top-10-best-adsense-wordpress-plugins