The microblogging site Twitter will allow cannabis ads on the platform starting today.

The company previously allowed CBD topical ads targeting some US users.

“Going forward, Twitter is allowing advertisers to promote brand preference and informational cannabis-related content for CBD, THC, and cannabis-related products and services,” the company said in the blog.

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Cannabis advertisers on Twitter will still need to follow certain guidelines to promote their products. Advertisers need to be pre-approved by Twitter and can only target users in locations where they’re licensed to promote cannabis products and services. Ads also can’t promote or offer the sale of cannabis, with a few exceptions for some topical CBD products.

Advertisers won’t be able to target users under 21 and can’t target or appeal to minors. Twitter also says ads can’t depict cannabis use or make efficacy and health claims.

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