After exporting a list, you can see Match information in the list and in the filters.
Important information
The "Match" is only calculated for Sales Navigator search exports.
The “Match” filter lets you know if the search results match the keywords used and the filters of your Sales Navigator search. Sales Navigator may provide you with up to 30% of results that do not match your search. After an export, the system automatically checks whether certain filters (position held, company size, etc.) have been respected.
This information is therefore there to allow you to easily clean your lists of leads that do not meet your search criteria.