vimEdit

i = Switch to insert mode and start inserting characters at the cursor's position
a = Switch to insert mode and start appending characters from the next cursor position
x = Delete the character under the cursor
dd = Delete the entire line
o = Insert and empty line and start appending on it
cw = Delete the word under cursor and start appending new character. This operation is useful when the user wants to change a word
v = Enter the visual mode, in order to select characters
V = Enter the visual mode and select the entire row