Hello

row_padding_top - adds a top padding of 120px

row_padding_bottom - adds a botom padding of 100px

has-animation - adds a fading animation effect

small – small row width.

full – makes the row full width.

text-align-center – center aligns the text within the row.

has-animation – adds an animation effect

one_half – First 1/2 Column

one_half last – Last 1/2 Column

one_third – 1/3 Columns

two_third last – 2/3 Column

in general is good to create your own CSS classes in appearance -> customizer -> additional CSS and add them to Extra class name attribute of the current row. This works great with AJAX loading.