Hi,

For installing third party modules in odoo, first of all what you have to do is that, using the download button, download the purchased module, then you will be able to get a zip file. Just extract the zip file, then you will get a folder like website_facebook_pixel, now we have to move it to the client's odoo instance.

If the clients odoo is hosted in some server, you have to move it to the server and place the module in his addons path. To move the code to server, lot of tools are available, if you are using ubuntu, you can use ssh, putty etc.

Once you are able to move to server, next task is to find the custom addons path, for this, what you can do is that, go to the folder etc, by typing
cd  /etc

Then inside this folder, most probably there will be a file name odoo.conf or odoo-server.conf , this is the doo configuration file, using nano editor you can open it.

sudo nano odoo.conf

Once you open it, inside the content, you will be able to see the addons path, get the custom addons path from it, it will be something like  /opt/custom or /opt/odoo/custom .

So now you get the custom addons path, place the module inside it and now you have to restart the odoo service. Once the service is restarted, go to the odoo user interface, activate the developer mode, click update app list and search the module and install it.

https://www.youtube.com/watch?v=KCGAKbVT92k

Thanks