A biosketch is a short one or two paragraph summary of 'you'. They are required in completing applications and making progress reports. Focus on who you are, what you have to offer, how you got to.
Writing a bio can be a fun challenge, a look at some peoples bio could get you wondering and thinking out loud; most especially in the present era. Most times, individuals and companies tend to write astray, mix up and add what isn't required in a standard bio. Write a brief biography to introduce yourself, highlig.