Crawl budget is the number of pages a search engine is willing and able to crawl on a site in a given time.
It mainly matters for large sites with thousands of URLs, such as e-commerce stores with filters.
Removing duplicate and low-value URLs, fixing redirect chains and keeping sitemaps clean help search engines spend their crawling on important pages.
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.
