isdisplayed method
isDispalyed() -> verifies the presence of a web element within the web page.
If found -> true, If not found -> false
checks for the presence of all kinds of web elements available
isEnabled() -> verify if the web element is enabled or disabled within the
web page.
is primarily used with buttons
isSelected() -> verifies if the web element is selected or not
is used with radio buttons, dropdowns and checkboxes.