First step of adding rows to your tables is to click on the phpMyAdmin from your Cpanel or follow the following format:
yourdomain.com:2082/3rdparty/phpMyAdmin/index.php?
Make sure to replace the word yourdomain.com by your actual domain or your IP address.
Second step is to choose the name of the table that you want to the rows under. as the following figure shows.
After selecting the table name your going to see a list of the current rows that are already exists and thier type and so on.
As the following figure shows you can specify the number of the rows that you like to add to the selected tables then click the button GO.
Note: you can add rows at the end or beginning of the table or after a specific a row.
Last step is to fill all the requierments to add a new rows.
Field --> the new row's name
Type --> The type of the data that is going to be inserted in the row later on by your script.
length/Values --> the total charecters for the input
Default --> you can input a defult value for the field that will incase it never was change it will keep that value.
Extra --> you can have integer type row with auto increment value.