65%
Odsetek ankietowanych Polaków deklarujących korzystanie z narzędzi AI według raportu „E-commerce w Polsce 2026”
IAB Polska2026Poland
A stored result of a computation, served instead of recalculating it. It can exist at multiple levels simultaneously: in the browser, at the CDN provider, on the server, in the application, and in the database.
Why it matters
Cache determines the speed of a service, but when changes are made, it can become the source of 'I fixed it, but nothing changed.'
What's missing without it
Without awareness of how many layers exist, diagnosis ends with 'but it’s already gone from the database' — while the page still shows the old content.
When it is used
Whenever a change is made that isn’t visible on the page, and when cleaning up after a breach.
How we use it
When cleaning up after an incident, every layer must be cleared. Even one missed layer can cause deleted content to continue displaying.
Numbers worth knowing
Technical in data
470 000 000 000
IDC Worldwide AI and Generative AI Spending Guide 2026 V2 prognozuje, że europejskie wydatki na AI osiągną blisko 470 mld dolarów do 2030 roku
IDC09/2026Europe
470 000 000 000
Prognozowane całkowite wydatki na AI w Europie w 2030 roku według IDC Worldwide AI and Generative AI Spending Guide 2026 V2
IDC09/2026Europe
Figures from the same field — collected in our market data base.