You must have the listings in a CSV file (i.e., a document where the values are organised in rows and columns and separated with a punctuation mark). You can create a CSV file in Microsoft Excel, write Categories’ names in rows, and their records in columns. 

Once you create a file, go to the My Account > Listings section and click Import Listings. Then follow these steps;

1. Upload a CSV file with your listings;
2. Select a Column delimiter (i.e., a punctuation mark you’ve used in your CSV file);
3. Choose between the following Import mode options:

• Create new only;
• Update existing or create new;
• Update existing only.

4. Click on the Upload button.

Next, proceed to the Map Columns section:

1. The listing fields from your file get automatically uploaded to the ones with the same name (e.g., Title, Description, and Category). Make sure that the imported listings have all the required fields completed.
2. Click on the Import button and import listings along with their attachments.

As a result,  you’ve imported the listings from the file to your website.