We can use Conditional Tag is_home() to check if the page is the home page.
Quick Intro about Conditional Tags
Conditional Tags can be used in the Template Files to alter the display of content depending on the conditions that the current page matches.
Conditional Tags tell WordPress what code to display under specific conditions.
Conditional Tags usually work with PHP if /else Conditional Statements.
Things to remember before using it
For a Conditional Tag to modify your data, the information must already have been retrieved from your database, i.e. the query must have already run.
If you use a Conditional Tag before there is data, there’ll be nothing to ask the if/else statement about.
WordPress loads functions.php before the query is run, so if you simply include a Conditional Tag in that file, it won’t work.
The Main Page (Home page ) conditional tag
We use is_home() function to check if the page is the home page.
The blog homepage is the page that shows the time-based blog content of the site.
It returns true when the main blog page is being displayed.
If your home page has been set to a Static Page instead, then the function will only return true on the page on which you set as the “Posts page”.
You can change that settings from Settings > Reading.
Be careful not to confuse the two query conditionals:
On the site front page, is_front_page() will always return true, regardless of whether the site front page displays the blog posts index or a static page.
On the blog posts index, is_home() will always return true, regardless of whether the blog posts index is displayed on the site front page or a separate page.