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Explicit Wait is a code that pauses execution until a certain condition is met or the maximum wait time has elapsed. It is directed at a specific element or event.

• WebDriverWait in Selenium is an example of explicit wait.

Implicit Wait is a setting applied to the driver throughout its lifetime. It instructs the driver to wait a certain amount of time before throwing a NoSuchElementException when searching for an element. If the element appears earlier, the wait is stopped.

Main differences:

Feature	Explicit Wait	Implicit Wait
Application	to a specific condition / element	to the entire driver session
Flexibility	High, can wait for specific conditions	Low, waits only until the element appears
Configuration	For each wait case separately	Once for the entire driver
Selenium example	WebDriverWait(driver, time).until(...)	driver.implicitly_wait(time)

Example of explicit wait in Python (Selenium):

# Waiting until the element becomes visible
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By

try:
    element = WebDriverWait(driver, 10).until(
        EC.visibility_of_element_located((By.ID, "my_element_id"))
    )
finally:
    # Actions after waiting or handling TimeoutException
    pass

Example of implicit wait in Python (Selenium):

# Setting implicit wait
driver.implicitly_wait(10) # Wait up to 10 seconds before throwing `NoSuchElementException`

# All subsequent find_element/find_elements will use this wait
element = driver.find_element(By.ID, "some_id")

Using explicit and implicit waits together can lead to unpredictable behavior. It is recommended to use explicit waits for most specific cases, and either not use implicit waits at all or use them cautiously and with understanding of their global effect. Explicit waits are preferable as they provide more granular control over the waiting process.