Make the home page display posts for 1 category only

https://codex.www.ads-software.com/Function_Reference/query_posts

So would I use conditional tags ion my home page?
Can anyone point me to an example of only selesting a single category?

Copy index.php and all it home.php
Add the following code before this line:
<?php /* If there are any posts: */

<?php
get_header();
query_posts(‘category_name=category slug name’);
?>