Custom banners and footers at the top and bottom of your event pages are a perfect way of promoting your sponsors or partners. You would need to create a banner that accommodates their logo/partnership yourself but the footer is completely customisable. Note that only the footer supports hyperlinks, the banner does not.
Sponsors can also be placed into their own groups so that attendees can find them easier or know who is a sponsor/partner and who is not. Make sure sponsors/partners are approved before placing them in groups.
To learn more about Groups, click here.
To learn more about customising your event pages (including the footer and banner), click here.