In General , in Slenium Webdriver we have two types of wait commands are available. implicit wait and explicit wait.
implicit wait :
It's global setting applicable for all elements and if element appear before specified time than script will start executing otherwise script will throw NoSuchElementException.
Thread.sleep() - It will sleep time for script, not good way to use in script as it's sleep without condition.
driver.manage().timeouts().implicitlyWait(120,TimeUnit.SECONDS)
explicit wait: Wait for the element to be present
WebDriverWait explicit=new WebDriverWait(driver, 10); // 10 in secs
explicit.until(ExpectedConditions.visibilityOfElementLocated(By.id("element id"))).click();
