Use a Semicolon to:
Connect two independent clauses
when you do not use a coordinating conjunction(for, and, nor, but, or, yet, so).
- He wanted to watch his sister play soccer; his girlfriend insisted on going to the movie instead.
Separate items in a list of words, phrases or clauses
when there are commas within the listed items.
- He decided that he would explore, choose, and book an event venue; design, write, and revise an invitation; and print, address, and mail the material before the end of the week.