Prestashop
Tag Manager
Tag Manager can be installed in the theme's header template file.
\themes\<<theme>>\header.tpl
This needs to be wrapped around with {literal}{/literal} tags
Conversion Tracking
This can be done but using the free Plugin that hooks onto the order page:
https://bitbucket.org/ed_eichman/prestashop-gtm-data-layer-module/src/
Download the files and make sure it is in the modules folder. the folder structure should be:
\modules\datalayer\
Then the module will need to be installed. If the module does not show up, you may not have permissions even if you are set up as admin & can see the modules.
Check Module Install Permissions
To check if the account has install permissions use adminer and access the database.
go to the employee and get the "id_profile" field from the relevant employee row. Then go to the tab table and get the "id_tab" field from the row that has a module called "AdminModules". Then go to the access tab and match up the "id_profile" & "id_tab" with what was retreived before to see the file permissions. Change add to "1" to enable installation.
Clear Cache
To clear the cache via FTP go to:
\cache\smarty\
then inside both "cache" & "compile" folders, delete all folders except the index.php and the flush file.
refresh page and cache should rebuild
To Clear cache via admin go to:
Advanced Parameters > performance
Then Click the "clear cache" button