Add a title to a site in a web browser

Hello friends,
I want to fill in the title and description section of the site using text, but the title and description section do not have a name, but an ID.

id="post-title-0"

And description section

<code>

<textarea role="button" aria-label="addblock" class="block-editor-default-block-appender__content" readonly="" rows="1" style="overflow: hidden; overflow-wrap: break-word; height: 29px;">write a text</textarea>

</code>

These codes are related to the site panel in WordPress
It is very important, please help