Why is Selenium not detecting elements on the page?

Sometimes while executing the test script, elements are not identified even though they are present. Let's say you are searching for a keyword in Google, and after running the script, you get an error - no element found.

The best practice is to use waits in Selenium. For example, in this case, you can Explicit wait.

WebDriverWait wait = new WebDriverWait(webDriver,50);
wait.until(ExpectedConditions.visibilityOfElementLocated(By.name("LambdaTest")));

This will make Selenium wait until your search box appears in the website.You can check another question if Selenium taking much time to load.