My Request for additional evidence was mailed

Hi All,

today my status got changed to My request for additional evidence has been mailed. In that it is showing we mailed a request for additional evidence for your Form I-129. what is this means what should i tell my employer about this.

can some one answer and help me.

Your employer would receive RFE notice within couple of weeks. Based upon that, employe will have to take next steps - collect the information and documents asked and then reply to USCIS.