There are two ways to add a Profile to a Campaign: straight from the Profile, or from Discovery. The only way to add multiple Profiles to a Campaign at once is through Discovery.
To add one Profile to a Campaign straight from the Profile, click on the 'Add to Campaign' button in the top right corner of the Profile header. Keep in mind, you have to have previously built the Campaign for it to show up in the drop-down, so make sure you proactively build your Campaign prior to getting to this step.
To manually add one or multiple Profiles to a Campaign from Discovery, first click on the little circle in the upper left corner of the Profile card. You can access this circle by hovering over the Profile card that you want to add to your Campaign. Once you click in the circle, you will see a blue pop-up bar appear with multiple options for you to choose from. Once you've manually selected the appropriate Profile card(s), simply click on the 'Add to Campaign' button in the blue pop-up bar.
To bulk-add multiple Profiles to a Campaign, first select the number of Profiles that you want to add by clicking on the 'Item Selected' button and then select the corresponding number of Profiles you want to add (these number sets are pre-formatted). Once you select the number of Profiles you want to add, you can then complete the aforementioned step of clicking on the 'Add to Campaign' button from the blue pop-up bar. Again, just like adding Profiles to a Campaign from the Profile, you have to proactively build your Campaign prior, so please make sure you complete this step first. Below is a video of how to select Profile(s) and add them to a Campaign in Bulk.
Don't want to build a Campaign but want to be able to access your Discovery results retroactively? This is where bulk labeling can come in handy. Click HERE for an overview on how to bulk label Profiles and then search for your labels later in Discovery.