This is the 706th most frequent Swedish word.
berättat
"Berättat" means "told" or "narrated" in English.
In this instance, 'berättade' is the simple past form of 'berätta' (to tell), where 'berättat' and 'berättade' are variations depending on tense. This sentence illustrates the act of narrating a story that happened at a specific time in the past.
Jag berättade en historia för barnen igår kväll.
I told a story to the children last night.
Here, 'berättat' is used as the past participle form of 'berätta' (to tell), which is commonly employed to indicate an action that has been narrated or shared. The auxiliary verb 'har' (has) denotes that the discussion about her trip has already occurred.
Hon har berättat om sin resa till alla.
She has told about her trip to everyone.
This sentence employs 'berättat' in a future perfect tense scenario, augmented with auxiliary verbs 'kommer' (will) and 'att ha' (to have). It signifies an action (telling everything) that will be completed prior to a specific event in the future (your arrival).