Beginner help – please help me edit the code

Go to Pages -> About page and click Edit.

You should find Blockquote block at the end of the page content. Delete it to remove the blockquote in question.

Thanks for getting back to me so quickly. The weird thing is that when I edit the page there is no quote marks and even when I click to edit the HTML the <block quote> code is not there. I have also checked the templates in the theme editor and there is nothing to show <block quote> so I don’t know how to delete even the code.

When I create a new page it automatically adds these quotes and it is a mystery to me. I have created this blank test page which is totally empty yet it still has the quotes – where are they coming from?
https://www.hazelwatson.co.uk/test

Which editor are you using to add content? Classic editor/ Gutenberg or something else?. If possible can you add screenshot of the backend editor.

In classic editor, you should see following code at the end of the page
<p><blockquote></blockquote></p>

Thanks for helping me. I am using the Editor that is built into wordpress, I have attached a screenshot to show the HTML editor on the Art page here : https://www.hazelwatson.co.uk/wp-content/uploads/2020/05/2.jpg
As you will see there is no blockquote.

I also have the ability to edit via the Theme Editor in the Appearance menu here:
https://www.hazelwatson.co.uk/wp-content/uploads/2020/05/1.jpg
But I have searched on every page and I cannot find the blockquote.

Should I install a classic editor?

Thanks again

Try installing classic editor https://www.ads-software.com/plugins/classic-editor/ plugin and check the same page under HTML to see if
<p><blockquote></blockquote></p> is present.

Thanks I will try this. I really appreciate your help, have a nice day!

it coming from this rule

.the-content blockquote:before {
    float: left;
    margin-left: -.7em;
    padding: 0 5px 0 0;
    font-family: Georgia, serif;
    font-size: 2.75em;
    opacity: 0.8;
    content: "“";
}

if you can find where it coming from you can get rid of it by using

.the-content blockquote:before{
  content:"";
}

just place it at the bottom of your additional CSS at the bottom of customize

Oh my god @mrtom414 you are a magician! It worked! Thank you both so much for helping it was driving me crazy!