Websites are created for being visited by people and part of achieving this goal is performing very well among the other sites and internet competitors. Please always keep this important point in mind that when people begin using the search engines and make some queries, before clicking on the sites addresses and listings, they look at the descriptions of them then try analyzing them to guess what the pages are actually about. Please note that all of these considerations and calculations happen before they click on the links and arrive at the sites main pages and therefore, by helping them knowing what to expect after arriving at your site, you can increase or boost the percentage of daily clicks made on your site's listings in the main search engines indexes. As you know, title tags are the listings which come above any other properties or listings of the sites and so it is not possible writing the description lines over the title tags and hence, when people find an internet address of a website online, they view its title line and then move on to the lower following line to see what its description line says.
You may sometimes come across certain sites listings status online that may look rather odd to you because instead of the words and sentences written in the description tags, other parts and text words of the pages bodies are being used and indexed by the search engines. Such things usually happen when the description tags may look artificial or repetitive to the search engines crawlers and so other parts of the pages replace the description tags text documents and lines. If you have some experience building and promoting websites, you must have already heard of the term user friendly websites. Such sites are the ones which guide people and visitors to different sections of the resources online via a variety of means and ideas like links, banner ads, graphical files or even multimedia and animation representations. But did you know that the description lines too can play such important roles on the web? They indeed can help people figure out what a page content is about actually and this can only be done by writing the relevant text lines and then adding them right below the title tags for your pages. Both search engines and people will be able to find and read the description tags.