So labels perform same concept in the blog. given on the right side.
Write the keywords in the "Labels" which represent the concept of your post.For example,if the post is about facebook utilities then you should write facebook or facebook utilities as the label.So,people can click on the label to see the post about facebook.
2)Links:-
Links provide the URL which will be represented in the address bar of the browser when site will be visited.Link will approximately same as your post title,you can check it out.So,give appropriate post title.
Post title and links will help visitors to search your web page,because when visitor search by keywords in Google search,at that time your post title and link matter most.As per your post title and link,Google compare keywords with it and represent your web page in search results.
So,give appropriate post title and link.
3)Search Description:-
Whatever you write in search description will appear below your web page result in the search engine like Google,Bing etc.So write proper search description which may help visitors to search your web page and decide that is that page is useful as per their requirements?
Give different search description for all post.