To exclude from your search results:
Previously exported leads
Current Clients
Competitors
Here's how to proceed:
1. Create an account or lead list
Tick the checkboxes > Save List > + > Create a list to store the leads you want to exclude from your next searches.
2. Add all the leads you want to exclude in it
Unfortunately, it's not possible to select all the leads in a search in one click. Therefore, you'll need to repeat this operation for all the pages.
3. Exclude Your Blacklist From Search Results
Once the list is completed you can go to:
Workflow
Account or Lead List
Click on exclude
All the leads or account in the list will be excluded from your search results.