1) Navigate to admin URL
2) Login to admin panel
3) Go to Dashboard -> Products -> Click on Export /Import Products
4) Then click on the Export Product button on the right.
5) Once you export the sheet you can make changes to the existing products.
Please note: action flag counter specs
1= Insert/Add new products.
2= Update existing products.
3= Delete products.
6) You will need to keep the name of the spreadsheet and the workbook as is when importing the sheet back in to the website.
7) Once you make desired changes please upload the sheet using Import Products module found on the same page.
8) You can also see the file which you have uploaded.
9) If any file upload fails then it gives error log file.