You MUST pic one website or blog service and sign up for it.
You must have 4-6 images from one body of work posted on it, but preferably more.
You should have an artist statement (if it fits the industry you are going into).
You should have a bio page (if it fits the industry you are going into).
You should have a resume / past exhibitions / CV page (if it fits the industry you are going into).
If you do not have these things, you should have other pages, links, or information that mirror the kinds of intersts displayed by other people in your industry.
NOT MANDATORY / ONLY RECOMMENDED
I think everyone should have their professionalization packet categories listed on a secure password page, but it is not mandatory.
I think everyone should have links to related artists, journals, and websites that they follow, but it is not mandatory.
I think eveyone should have links to other social media sites that they use related to thier art practice, such as instagram, facebook, etc., but it is not mandatory.
I think everyone should aim to make their site phone compatible, but it is not mandatory.
The website should mirror the look of other websites in the field of interest that you want to pursue.