Hi today i have seen sites which are found in google search i have came to know they are using best seo for images suppose example if we write article about facebook can we give the alt name like facebook-login to all multiple images or only one image we can give the unique name and remaning can we give different names i hope you understand my question.
When it comes to SEO acceptable keyword is the main reason to develop your search engine ranking. Search engines also crawl keyword in your images so you have to specify keyword in your images.
Use proper image with alt & title tag(which using on image) then use this image in SMO & other promotional fields.
Google in most cases will display the featured image of your post, so you need to focus on that image (make sure you give it a relevant title, alt-text and description). However, if your post has good title and content, then you would most probably rank that featured image if somebody search for the keywords in the title. Hope this helps
Image optimization is one of the most important thing of SEO. Alt tag plays a nice role because search engine cannot read the image but it can read the text you read as the alt tag.
in addition to adding alt tag, create an image XML sitemap to your site will help Google discover images on your site