So I want to insert WA banner to sidebar on my website. After I clicked on $ in top menu I went to banner section. There I picked the first banner :
Copied HTML code and went to Wordpress dashboard. There I chose Apereance->Widgets->HTML code and pasted copied HTML code. And great. Banner appeared on all my pages and posts (what I don't like but I will deal with it later).
I have to point out that I'm working with Gutenberg so what I write is valid for the procedures in Gutenberg.
After I tested my page I was not satisfied. After click on banner I found mysefl where I want to be but the new page overwhelmed my page. I wanted the new page to be opened in new tab in order to return to my site would be as easy as possible.
I asked for help and has received it from all sides as is normal in WA. The solution has come from Phil (Feigner). The HTML code needs to be corrected as follows :
In second row before ><img must be inserted
Look out, must be space before target.