PRO is not a second plugin. There is nothing extra to download or install. Your licence key carries the entitlement, and when it includes PRO the AI code loads and the AI controls appear.
The AI Copywriter:
Open any campaign in the builder and look at the top of the Content tab. There is a Write it with AI box. Describe your offer in a sentence, choose a tone from friendly, urgent, playful, professional or bold, and click Generate copy.
Engage asks the model for a headline of up to 8 words, a sub-line of up to 16 words and a button label of up to 4 words, tailored to the campaign type you are building, and drops all three straight into the fields. Everything remains editable, and nothing is saved until you save.
The AI Campaign Builder:
On the New Campaign screen, PRO adds a Build It With AI box. Type your goal in plain English, for example get more newsletter signups from my blog posts, and click Build my campaign.
The model chooses the campaign type, the trigger, whether it should collect an email, and writes the headline, sub-line and button. Engage validates every one of those choices against what actually exists before using them, so an odd answer can never produce a broken campaign. The result is created as a draft and you land in the builder to review it. Nothing is published automatically: you see it before a visitor does.
Both features need an AI key connected on the PRO tab first. That is covered in its own article.
Planned, not built yet:
The PRO tab lists three features with a soon badge, and they are not working today: split testing, geo targeting and spin to win. Multi step funnels, AI visitor targeting and advanced analytics reporting are also on the roadmap rather than in the plugin. Do not plan a campaign around any of them until they ship.