Is it possible to add bulk keywords (around 500 keywords) with custom URL's? If yes please guide! I am manually adding custom URL's for each keywords Thanks
You should consider using their bulk upload feature. It will save you a lot of time. Download the campaign you want to edit. There's a column in the spreadsheet that is specifically for custom keyword URLs. Make your changes and upload the spreadsheet back in to your account.
If you have trouble uploading the spreadsheet back in to your account, just send it to them and they'll upload it for you. (which also save a lot of time)