How to put a title tag in the wordpress website

Site URL?

URL is TechOne3.in

You may start by correcting validation errors. You have a very large number of markup errors (97 Errors, 22 warnings for your home URL) that sometimes gives 500 Internal Server Error.

I have verified some of your pages/links and they show titles. For the correct use of the SEO plugin follow its documentation correctly.

Thanks a lot for your replies, Krishna could you please elaborate how can I correct validation errors? Because several times I faced internal server error and even my host provider is unable to resolve the error. I will ever thankful for this act of kindness.

Start one-by-one from the top of the error list.
Search Google of the errors you don’t know the meaning.

You may find errors will disappear subsequent to another’s solution.

But Andrew in which file I have to search for the errors because there are several .php files in my website?

Give an example of one error in which you don’t know the file to search.

Line 2, Column 105: duplicate specification of attribute “xmlns:og”
…” xmlns:og=”https://ogp.me/ns#” xmlns:og=”https://opengraphprotocol.org/schema/”>

Anyone can tell me how to find validation errors because my website having many validation errors but I am unable to findout any single file containing those errors, please help me! Markup validation errors are given in the link.

I find that a number of errors are from your themes, plugins, and your ad programs like AdBrite. You may turn of all the plugins and revert to the WordPress default theme and check the number of errors. That will give you an idea of the source of errors and how far you can reduce them. Some errors you may not be able to correct, for example, errors created by AdBrite. You have to do a bit of spadework and do the job yourself.