Well, you can create custom fields, then pull those custom fields into your post template(s). This is basic functions of WordPress and not theme specific.
Yoast should not slow down your site if you increase memory allocated to WP (try 96M in your wp-function.php file), and if you turn off un-needed functions.
However, there are other plugins you can use to create custom meta tags.
Yoast is useful for managing the trickier things like secondary pages for archives, indexes to eliminate duplicate meta data.
Hi
Thanks @Chris for your help!
@barryc123 yoast plugin is tested and works fine with our theme. Also your site could be slow for various reasons. Please make sure that the parameters from System status have the values indicated in our documentation: https://forum.tagdiv.com/newsmag-requirements-for-newsmag/ – https://forum.tagdiv.com/system-status-parameters-guide/ Also to improve your site’s page speed check our documentation in this regard: https://forum.tagdiv.com/how-to-make-the-site-faster/
Let us know if you need further assistance on this.
Thanks!