What this mean?

来源: 于 2010-08-28 15:23:13 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

In offer letter there is a senstence

" you grant as an XXX (job title) will be options equal to XXXXX shares of the company with a 5 year vesting"

What this mean?