Every good piece of software has some kind of documentation. If your technical issue relates to some of the software you are using to power your site, it would be a very good idea to consult any available documentation to determine whether your issue is known already and if there is a fix for it.
Plugin documentation
If your problem relates to a plugin, start there. If you don’t know already where to find the documentation for your plugin, start by going to your Plugins page in your site’s dashboard (normally yoursite.com/wp-admin/plugins.php) and look for the links below the listing for the plugin in question. Should look something like this:
Not all plugins will have the same links available. Some may have links to the author’s site, some to the plugin listing on wordpress.org and others may include links to a dedicated support or documentation site.
Theme documentation
Your theme could very well be causing the issue you’re currently struggling with too. If you don’t know where to go to get documentation for your theme, start by going to Appearance in your dashboard and looking for links to the theme author’s site.
WordPress documentation
Yeah, WordPress has documentation too. Lots of it. Official documentation for WordPress can be found on the Codex so that is a great place to start. However, this can be a pretty overwhelming amount of information so if you don’t find what you’re looking for after browsing for a bit, let’s just move on.