Advance notice is a phrase used to inform people about upcoming events, plans, or changes that will affect their lives in some way. There are a number of synonyms that can be used to convey a similar meaning, such as notification, forewarning, announcement, alert, heads-up, and pre-announcement. These terms all imply that information is being provided to people in advance of the actual event or change, allowing them time to prepare, adjust, or take action as needed. Depending on the context, some synonyms may be more appropriate than others, but all serve the same basic purpose of giving advance notice.