Two lists on your profile, pulling in opposite directions. Extras are what you offer. Requisites are what you need from the client. Both are set under Content → Profile.
Extras
Under Services. Thirteen to choose from:
MC Services · Wireless Microphone · Spotlight Lighting · Dance Lighting · Early Arrival · Photobooth · Sound System · Karaoke · Fog Machine · Visual Projection · Customized Playlist Creation · Themed Event Decor · Interactive Games/Activities
Select only what you can genuinely supply. Clients filter on extras, and being surfaced for a photobooth you don't own wastes everyone's time.
Prices are set per proposal, not here. Listing an extra says you offer it, not what it costs.
Extras worth offering
MC Services and Wireless Microphone are the two most commonly needed at weddings and corporate events, and the two most often forgotten by clients until late. Offering them makes you a complete solution rather than one supplier of several.
Early Arrival is worth listing even if you rarely charge for it — it gives clients a way to ask for setup before guests arrive without paying performance rates for the time.
Requisites
Under Policies. Thirteen again:
Meal/Snacks · Electricity · Water/Softdrinks · Parking · Lighting · Microphone/PA System · Technical Support · Event Schedule · Storage Room · WiFi/Internet · Stage/Platform · Security Assistance · Marketing Collateral
These show in the Policies tab of your profile, and they become defaults on your proposals.
Choosing requisites
Be realistic rather than exhaustive. A list of thirteen trains clients to skim, which defeats the point.
The ones that actually prevent problems:
Electricity — obvious indoors, not obvious in a marquee.
Parking — where you'll otherwise be carrying heavy kit a long way.
Event Schedule — getting the running order in advance is the difference between a smooth night and improvising around speeches you didn't know about.
Meal/Snacks — legitimate on a long booking, and easier agreed upfront than asked for on the night.
They're defaults, not fixed
You adjust requisites per proposal in the Terms step. A four-hour bar set doesn't need what an eight-hour wedding does. See Setting Requisites and Equipment.
Making them stick
Requisites listed on a proposal are agreed to. For anything you want formally signed, use a document — the Equipment & Tech Policy and Parking & Venue Access templates cover this ground. See The 8 Document Templates, and What Each Covers.