When a site is hosted on free wrodpress.com, plugin menu will not appear. Also if you don't have an account for the administrator level, you can't see the plugin menu.

You can use a plug-in like Gravity forms or a free plugin contact form 7 to create a contact form in WordPress.

A theme is an external effect of a website's presentation and designing. Whereas, a plugin is an interior effect which adds or remove some functions to a site.

You can customize some functionality in themes instead of installing the plugin, but plugins can't replace themes.

You should always update your site to the latest version of WordPress. Whenever there is a new WordPress version, you receive an update message on your admin screen.

There are two methods to update a WordPress site:

• One-click update
• Manually update

Security in a WordPress site is essential as these websites are favorite targets for hackers. A site can't be perfectly secured, but one can at least reduce the risk by applying different security measures.

Some of the measures to secure a WordPress site are given below:

• Choosing a host
• Strong password
• 2 step login authentication
• Limit number of login attempts
• Use SSL
• Keep site updated

If you forget or lost the password of your account, WordPress gives you an option to reset it through different methods.

There are four ways to reset WordPress password:

• Change password from the dashboard
• Reset password via email
• Manually reset the password through database via PhpMyAdmin
• Using emergency password reset script

Optimization increases the speed of your site and gives the best possible outcome. It improves the ranking of a website.

There are many tricks to optimize a WordPress site. Some of them are given below:

• Use CDN
• Use a caching plugin
• Use a simple theme/framework
• Keep site updated
• Split long posts into smaller pages

Template tags are used within themes to retrieve content from your database. It is a piece of code that tells WordPress to get something from the database.

Meta-tags are keyword and description used to display website or page information.

Custom fields are also called post meta. It is a feature through which users can add arbitrary information when writing a post. These metadata can be displayed using template tags in WordPress themes.