Where can I change favicon in my wordpress website?

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Here are the instructions from the WordPress Codex:

  1. Go to your WordPress Administration Panel.
  2. Click on Appearance.
  3. Click on Theme Editor.
  4. Select the file called Header or header.php to edit the file.

  5. Search for the line of code that begins with <link rel="shortcut icon" and ends with /favicon.ico" />. Overwrite it, if it exists, or add the following code below the <head> HTML tag.

    <link rel="shortcut icon" href="https://wordpress.stackexchange.com/questions/167736/<?php 
    echo get_stylesheet_directory_uri(); 
    ?>/favicon.ico" />