Perform this SEO implementation, in order to attract the interest of your blog post readers and improve your text visibility for humans and search engines, like Google, Yahoo or Bing. Find your WordPress functions.php and include the following piece of code:
/* Manually set word limit from 55 to any number you like(I set to 120 words), of each small excerpt at blog page */
function my_excerpt_length($length) {
return 120;
}
add_filter('excerpt_length', 'my_excerpt_length');