Step 1: Go to Campaigns
From your Alta account, click Campaigns.
Step 2: Create a New Campaign
Click Create Campaign.
Step 3: Select Social Signals
Choose Social Signals as the campaign audience source.
This is where you can create an audience based on LinkedIn activity.
Step 4: Choose the Type of Social Signal
You can create a Social Signals audience using different sources, including:
Specific posts
Search posts
Specific companies
Specific creators
Step 5: Create an Audience from a Specific Post
To create an audience from a specific LinkedIn post:
Select the option for a specific post.
Paste the LinkedIn post URL into the URL field.
Alta will identify prospects who engaged with the post.
You can build your audience from people who interacted with the post through:
Comments
Shares
Reactions
This is helpful because these prospects have already shown interest or activity around a relevant topic.
Step 6: Create an Audience Using Search Posts
You can also search for posts based on keywords.
To do this:
Select Search Posts.
Choose the time range for the posts. For example, you can change the time range from All Time to Last Month.
Add keywords related to the topic you want the posts to be about. You can add up to six keywords.
Step 7: Add Audience Filters
After defining the social signal source, scroll down and add filters to narrow your audience so the people you capture match your ideal customer profile. You have two kinds of filters, and you can use them together.
Structured filters
Structured filters let you narrow by fixed fields:
Company attributes
Job titles
Location
These are precise, but they match exactly — so on a social signals audience, where you're already starting from the people who engaged with a post, creator, or topic, stacking too many structured filters can shrink your list dramatically and drop good-fit people who didn't match every field exactly.
Flexible filters (Match Score)
Flexible filters solve that problem. Instead of exact-match dropdowns, you describe what you're looking for in plain language, and Alta scores each prospect against your description with a Match Score.
Add a flexible filter.
Write your criteria in plain language — for example, "works in operations at a company that sells physical products." You can reference prospect fields directly in your text (for example,
{{companyIndustries}}).Use the Match Score slider to control how strict the filter is. Each prospect is scored against your prompt, and the slider sets the minimum score required to be included:
Higher = stricter, fewer matches
Lower = broader, more matches
This lets you keep your social signals audience relevant without over-narrowing it — broaden the results to capture more good-fit people, then tighten the Match Score if you want a sharper list.
Tip: Start with a lower Match Score to see the range of people who engaged, then raise it gradually until the preview list matches the quality you want.
Step 8: Search for Prospects
Click Search.
Prospects will appear on the right-hand side of the screen. Alta will also show a preview of the posts it found based on your selected criteria.
Step 9: Review the Post Preview
After the search is complete, you can review the post preview section.
You will be able to see:
The posts Alta found
The prospects who engaged with those posts
The type of engagement connected to the prospects
You can scroll across the preview to review additional posts and engagement activity.
Why Use Social Signals?
Social Signals are useful because they help you target prospects who are already active and engaged around a relevant topic.
This allows you to create more personalized outreach by referencing:
A post they engaged with
A topic they showed interest in
A company or creator they interacted with
This can make your campaign feel more relevant and timely compared to generic outreach.
Recommended Use Case
Use Social Signals when you want to build a campaign around prospects who have already shown interest in a specific topic, company, creator, or LinkedIn post.
For example, if a prospect commented on or reacted to a post about a relevant industry trend, you can reference that engagement in your outreach message.
Important Note
Social Signals are only based on LinkedIn posts.