Noindex is an instruction that tells search engines not to show a page in their results.
It can be set with <meta name="robots" content="noindex"> or the X-Robots-Tag HTTP header. It suits thank-you pages, internal search results and private reports.
For noindex to work, the page must not be blocked in robots.txt — the crawler has to read the page to see the instruction.
SEO is the work of improving a website so it appears higher in unpaid search results for the searches its customers make.
SEOTechnical SEO makes sure search engines can find, crawl, render and index a website’s pages without problems.
SEOOn-page SEO is optimising the content and HTML of individual pages so they match what searchers are looking for.
SEOOff-page SEO is everything done outside your own website to build its authority, mainly earning links and brand mentions.
