can someone explain me correctly what does this information mean?
Can you explain what each line means?

Est. Shares      76,508,243 (done: 27.47%)
Your Valid      164.0933
Your Invalid    0.0000 (0.00%)

highest percentage and highest valid, Is it good or not?

yesterday the percentage stayed at 600% for 4 hours, for 4 hours I did not get any zcash, it's normal?