posted
v.v. to share information, photos, or messages online for others to see. You can also use it to mean keeping someone informed about a situation.
v. to publish content to a digital platform or social media network; to keep someone informed of the latest developments in a situation. Often used in the passive voice when referring to being kept informed.
She posted a photo of her lunch on social media.
The manager promised to keep the team posted on any changes to the project schedule.
While the journalist posted live updates from the scene, the editorial team worked to verify the footage before it reached the evening broadcast.
When used to mean 'informed', it is almost always used in the phrase 'keep (someone) posted'.
I will keep you postingI will keep you postedIn the idiom meaning 'to keep someone informed', the past participle 'posted' must be used, not the gerund 'posting'.