Collection

Copy the link of the collection you would like to send offers to this field.

Example: https://opensea.io/collection/boredapeyachtclub

(Just putting the slug also works: boredapeyachtclub)

Some collections, usually collections with multiple contract addresses, will require you to also put their contract address in this field. If it is required, when starting, you will see a message about it in the console. Here is how you can also provide the contract address you want to bid on:

slug--contract

Example:
boredapeyachtclub--0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d

Tip: You can copy and paste an URL directly from OpenSea 2 with traits, and the client will automatically fill the traits for you. Make sure to double check traits after doing so.