heads-up
noun [ S ]
informal uk/ˈhedzʌp/ usa warning or piece of advice about something so that you are prepared for it:
Leading senators were reputedly furious not to have had a heads-up regarding the news release.
a heads-up that sth We've given everybody a heads-up that we're not prepared to work without a contract.
a short talk or statement giving information on how a situation or plan is developing:
a heads-up on sth The company CEO recently visited City Hall to provide an early heads-up on the project.