hope well, need facing issue on wordpress website when post website url on facebook page show random image don't want 
in image understand issue talking about, want logo of website shown in place of space image, please helpme out of , thank in advance
you need put open graph tags in header.php. use combination:
<?php $theme = wp_get_theme(); $screenshot_url = esc_url( $theme->get_screenshot() ); if ( is_home() ): ?> <meta property="og:url" content="<?php echo get_home_url(''); ?>" /> <meta property="og:type" content="website" /> <meta property="og:title" content="<?php echo get_bloginfo('name'); ?>" /> <meta property="og:description" content="<?php echo get_bloginfo('description'); ?>" /> <meta property="og:image" content="<?php echo $screenshot_url; ?>" /> <?php elseif( is_category() ): $cat_id = get_query_var('cat'); $cat_name = get_cat_name($cat_id); $cat_desc = (category_description( $cat_id ) != '') ? category_description( $cat_id ) : get_bloginfo('description'); ?> <meta property="og:url" content="<?php echo get_category_link($cat_id); ?>" /> <meta property="og:type" content="website" /> <meta property="og:title" content="<?php echo $cat_name; ?>" /> <meta property="og:description" content="<?php echo $cat_desc; ?>" /> <meta property="og:image" content="<?php echo $screenshot_url; ?>" /> <?php else: ?> <meta property="og:url" content="<?php the_permalink(); ?>" /> <meta property="og:type" content="website" /> <meta property="og:title" content="<?php echo get_the_title(); ?>" /> <meta property="og:description" content="<?php echo get_the_excerpt(); ?>" /> <?php if(has_post_thumbnail()): $url = wp_get_attachment_url( get_post_thumbnail_id() ); ?> <meta property="og:image" content="<?php echo $url; ?>" /> <?php else: ?> <meta property="og:image" content="<?php echo $screenshot_url; ?>" /> <?php endif; ?> <?php endif; ?> i put separate og tags home, category , other pages, fallback theme image (this prevents random image being selected).
hope helps.
