To create a value-based Lookalike Audience, your source audience must be a Custom Audience that has customer value as a data type.

If you don't have the necessary Custom Audience ready, read the section called 'Creating a Custom Audience source', below. If you do, skip ahead to the section called 'Creating a value-based Lookalike Audience' below.

Creating a Custom Audience source

Here's how to create the Custom Audience you need to use as a source for a value-based Lookalike Audience.

Before starting, we recommend reviewing our tips for getting the most out of your data.

Getting started

To get started creating a Custom Audience with a customer value data column:

1. Go to your Audiences.
2. If you already have audiences, click the Create Audience drop-down menu and select Custom Audience.
   If you don't have any audiences, you'll see Audience Creation buttons rather than a drop-down menu. Click Create a Custom Audience.
3. Click Include LTV for better performing lookalikes.
4. Accept Facebook's Value-based Lookalikes Terms.

From there, there are five parts to creating your Custom Audience:

Add customer file

Select customer value

Edit data mapping

Hashed upload and creation

Next steps

Below, we'll break each one down.

Add customer file

To add a customer file:

1. Choose whether you'll upload your customer file as a file (.txt or .csv) or copy and paste it.
2. If you choose to upload, click Upload File and select your customer file. If you choose to copy and paste, do so in the "Paste your content here" field.
3. Give your audience a name and description if you want to.
4. Click Next.

Tip: You can download a data file template we've created that's set up to help our system map your data more easily. Click Download file template to take a look.

Select customer value

To select customer value:

1. Click the Select value column drop-down menu.
2. Select the column that you want us to use for customer value.
3. Click Next

Edit data mapping

We show you a preview of your data and how we'd classified it. There are three statuses you may see in this preview.

• means we think we know what type of data this is (but you can correct us if we're wrong – see below) and will use it when trying to match the information in your customer file to people on Facebook. Only the data with this symbol gets uploaded for matching.
• means we aren't sure what type of data this is or you've told us to leave it out of matching. If we aren't sure, you can tell us (see below). Take a look at our best practices guide to make sure it's formatted in a way we can use.
• means the data type has been identified (either by us automatically or by you), but we can't detect a supported format. You may have to reformat the data in your file or select a formatting option from a Choose format drop-down menu (see below). For example, birthdays can be listed in different formats, such as MM/DD/YYYY or DD-MM-YYYY. Learn more. You can also leave the data type out of matching (see below).

Note: If you're seeing a lot of errors, it may be because we're looking for the wrong delimiter (the punctuation mark that separates data points). You can change this by hovering over "modify the delimiter" and choosing a new one.

You can interact with your data preview in three ways:

• Changing the data's type
• Removing the data from match consideration
• Changing the data's format

To change your data's type, click the drop-down menu and choose what type of data you've provided. From this drop-down menu, you can also choose Do not upload, which tells us not to use that data when matching.

To change your data's format, click the Choose format drop-down menu and choose what format we should be using to match your data.

Note: Every piece of data requires a type to be usable, but only some kinds require formatting details. You'll only see the Choose format drop-down menu if it's necessary.

If you need to change anything about your customer file to maximise the number of identifiers we can use, do so now. Once you're ready, repeat the steps above. When you're satisfied, click Create and upload.

Hashed upload and creation

We hash all of your data except the value column. (We can't hash the value column because we need to use it to learn who to add to the Lookalike Audience that you'll be creating when you've finished here. We can't learn from it if we can't read it.) Then we upload your data and create your audience for you. This may take a little while if your file is large. Feel free to continue working in another browser tab or window while you wait.

Next steps

When we've finished creating your Custom Audience, click the prompt to create a Lookalike Audience or go to your Audiences and click the Create audience drop-down menu and select Lookalike Audience.

Creating a value-based Lookalike Audience

With your source audience ready:

1. Go to your Audiences.
2. Click the Create Audience drop-down menu and select Lookalike Audience.
3. For your source, choose the Custom Audience with a value column that you created.
4. Choose the country where you'd like to find a similar set of people.
5. Choose your desired audience size with the slider.
6. Click Create Audience.

You can also use the advanced options to create a set of Lookalike Audiences. Learn more.

Additional information

* Nguồn: Facebook