Hello everyone, i have just started learning some basics and was wondering if anyone can explain me the read and write in this selection field_?

comm_method = fields.Selection([
    ('percent','Percent(%)'),
    ('fix','Fixed'),
    ('percent_and_fix','% + Fixed'),
    ('fix_and_percent','Fixed + %')],
    string="Commission Method",
    read=['odoo_marketplace.marketplace_seller_group'], write=['odoo_marketplace.marketplace_officer_group'],
    copy=False
)