What is the important of Title & Description tag?

They define the webpage title and content description in search engines.

Hi Friends,
Title tag and Description is very important in website because it gives the overview of your brand. When a user search for a particular query on search engine, after the result the first thing that he will check is the title of the page whether it'll match to his query or not. So you should add a proper title to your website. Apart from that you can add your main keyword in the title.

It is a part of meta tags that we are implementing on the website to make it search engine friendly. There Should be only 65 characters in a title tag. Title tag is equally important for both SEO as well as SMO purposes.

Isn't it strange that without knowing the basics of SEO, person starts doing link building to improve the visibility of their website in SERPs?

Title is very very important factor for search engine ranking.

Relevant meta title and description according to the targeted keywords will help you importantly in boosting your ranking positions on search engines. They are the most important aspects for SEO.

Title tags and meta descriptions are bits of HTML code in the header of a web page. They help search engines understand the content on a page.