Yes. Your content needs to follow the campaign brief and the tasks in your contract, unless the brand agrees a change with you in writing.
Want to change something? Ask the brand in the campaign's "Inbox" tab before you create it, and keep their answer in the chat.
Before you submit: your upload is checked against the brief automatically. Fix anything that's flagged first.
Before you post: wait for the brand to approve your content. Posting without approval can delay or void your payment.
Payment terms, usage rights and how long content stays up are the same for every creator on a campaign.