Hlo Friends,
Can anyone tell me, What are the limitations of title and description tags?

You can use 50 to 55 words in Title tag
140 to 150 words in meta Discription

In Title you can use  55 to 65 characters with spaces.
In Description 150 to 160 characters with spaces.

Optimal title length. Google typically displays the first 50-60 characters of a title tag. If you keep your titles under 60 characters, our research suggests that you can expect about 90% of your titles to display properly.

Meta descriptions can be any length, but search engines generally truncate snippets longer than 160 characters.