I found that my site indexing pages has an issue. Some of pages just only display about 50 characters as discription meta tag. I haven't added discription for all posts. Normally, google should auto get 160 characters, but now why some of posts' discription only 50 characters? The content has issue or not good? But i found that some of large site has this issue too, include wordpress.org's forum posts. Any ideas for this?
Man, google has loads of website to take care of, they can't possibly be displaying every desired info, but you should consider yourself lucky that you site is even displayed, the vast majority of people doen't even get near there