Hi milkshake,
the VPS is a statement that you make that can be read to the court on how the situation has impacted your life. It really is your words so no one should be advising you what to put in it. It can be as long or short as you want it to be. The police should have given you a booklet about it, if you haven’t got one then ask your investigating officer to email it or post it to you.
What you need to be aware of is that the VPS is disclosed to the defence so your ex will know what is in it. Some people choose not to make one because they don’t want their ex to know the impact their actions have made on them. For example some women may that they feel unsafe in their own home and cannot sleep without a light on, but they don’t want their ex to know this.
To reiterate, you do not have to make one, but you have to be given the option to make one.