How to deal with feeds in XML format?

Question

Feeds

I really can't figure it out.
Recently I came across such a file as xml. I decided to work in one of the affiliate programs.
Previously, the presentation was clear. There is an offer. There is an affiliate link. Forward! All clear.

But there was this word feed. I think that if there is such a tool, then, probably, it is used and useful. Decided to do it.
Downloaded.
Opened in html editor. I see that there are tags, there is text, there is a photo (links to them), well, a full-fledged information block for a showcase on the site.
I'm naive….
In search of tons of information in the vastness of our Internet space, what is it in professional terminology. And what is it for. And what is its main task? And it is written in such a way that you need to study every word on Wikipedia. I mean that there is no simple explanation to make it clear even to those "not sharp" in this matter. It may or may not change quickly.

Further worse.
I decided to view the downloaded file in the browser and saw the typing. All in one line. (I'll attach it in screenshots. Suddenly someone needs to remember how it looks)
and as a result it is displayed like this
. I think .... Probably, it is necessary to prescribe styles for everything ... in order to somehow consider what is in these words that are not separated by commas.
And nefiga ... Since such an algorithm that I can't help but probing, not flexoboxing. And then comes this feeling, which is just .... (any obscene language will do)… You don't know what to do with it.
Think. Part two (humor from hopelessness already).
I'm not the first to experience this, that's for sure. Someone figured out how to change this file and place it on my site (at the moment I want to make an online store showcase).
I am contacting support. Answer. Our webmasters use this tool well and we wish you the same. It is no longer our responsibility.
Here is such a situation. I didn't find how to resolve this issue. Having shoveled, I will repeat a lot in order to find an answer for myself. Is it being done at all? Can this be altered somehow to suit your interests? Or only use for Google Merchant and similar possible services.? And further without options.
I ask all those who are not indifferent, who will respond. HELP!!!:)))
Maybe there is some kind of script. Maybe there is some kind of code ... Maybe there is some magic word ...))) Or just say that it is only possible to style each product manually, spending 200 years on this, and then everything will work out for me. And I will calmly move on to the next point of interest. Thank you.

Answer 1

there are tools for XML parsing, in all web languages ​​so for sure