As the name suggested WebElement refers to the elements present on the webpage like buttons, textboxes, links, images, radiobutton etc.

In Selenium WebElement is an interface which is use to handle these webElements using below methods.

Mostly frequently used methods 

findElement()

findElements()

click()

clear()

getText()

getTagName()

getAttribute()

isEnabled()

isDisplayed()

isSelected()

sendkeys()