What is technical SEO?
Technical SEO is type of improvements and snippets of code provide data about the website,
Sitemap file
This XML file includes all links of the website and other data this file holds. This file is submitted to the search engines to accelerate the processing of indexing
Robots.txt file
This file is being at root of the website and tells the search engine to crawl the website content or not
Website speed
The more your website is faster the more search engines will like the website
Responsive design
This refers that the website looks good on all devices which means that the website design is adaptive automatically according to the device
Canonical links
If you have a multiple similar pages and want to keep them you can tell the search engine via the canonical link
404 pages
Not found pages are must be handled, throw 404 pages or redirect it matched ones
HTTPS
There are to ways to access the website via http or https and https is popular to the SEO
Structured data
Structure data is a type of snippets that are provide in multiple format to describe your content, these are example