How to track which search engine a client came from?

Question

contextual advertising

Hello.
There is a website - we sell 7 different products. Each item has a different value.
We give contextual advertising in Yandex and Google.
Sometimes we test like this, we give it on Yandex, but not on Google, we look at the statistics of orders. Then vice versa...
But the information is not accurate. According to the analytics of the forms, you can see how many people enter and how many fill out the order form, but where they came from is not visible ...
Purpose:
1. Learn to determine where the person who filled out the form came from.
2. Set up the conversion, because profit from the sale of one product is known.
Please tell me how to figure it out, or maybe there are some videos to watch on this topic? What queries to look for... Thank you.

Answer 1

UTM tags to help you.

Answer 2

Here, IMHO, is a good material on this topic: convert.ua/blog/ppc/utm-parameters
Well, in general, I recommend google "segmentation of advertising campaigns by utm tags".

Answer 3

utm tags and call tracking with forwarding in crm

Answer 4

Everyone writes correctly, the simplest thing is utm tags, they are easy to set up, then everything will be visible.
A little more difficult is call tracking, but it will also be visual, namely for real orders.