When a post is finished but the title is limp → ask for a title and a summary
On a post you have already written, open the AI panel in the sidebar and use the title and summary generation, then choose from what comes back.
Why this one: Jetpack AI reads the post from inside the editor, so its suggestions come from your actual saved text. It also spends one request instead of the several a full draft burns, which makes it the sensible first thing to try on the small free allowance.
Tweak: Jetpack's product page describes a one-click optimisation of post title and featured image at publishing time — the same idea with fewer clicks, worth finding before you do this by hand twice.
When a post has no image and you were never going to make one → generate a featured image
In the Improve with AI section of the post sidebar, or by choosing Generate Image when you set a featured image, describe the picture — Jetpack offers suggested wording drawn from the post.
Why this one: Jetpack's docs put an exact price on this one action: one successfully generated image costs one request, charged whether or not you end up using it, while failed generations are not charged. It is the only place in this tool where clicking twice has a stated cost, which makes it the action worth understanding before the others.
Tweak: The default is square. Check how your theme crops a square featured image before you spend several requests building a set of them.
When a paragraph is too long to read → rework it where it sits
Select an existing paragraph, heading or list and use the AI option on that block to shorten it, expand it, or change its tone.
Why this one: The tool acts on the block you selected and writes back into it. Jetpack's docs list ten tone options on that same menu, which turns "make this less stiff" into a menu choice rather than an instruction you have to phrase well.
Tweak: There is also a clarity tool, Write Brief with AI, that flags long sentences and complex words as you write. Jetpack's docs say using it does not count towards your request usage — the one AI feature here you can simply leave switched on.
When a post deserves a second-language version → translate it in the editor
Select the post's content and choose translate from the same AI menu; Jetpack's docs list twelve languages.
Why this one: The translation is written back as ordinary editable content, so you end up with a post you can keep working on rather than a block of text to reformat. Jetpack counts each action as one request, so translating a long post a paragraph at a time is markedly more expensive than doing it in one pass.
Tweak: Automattic's guidelines ask you to review and edit AI output before publishing. For a language you do not read, that means finding somebody who does — not skipping the step.