HTML - Hyper Text Markup Language, Ndio language inayotumika for structuring web pages. Ukitaka kuweka paragraph kwenye website yako unaandika <p>Paragraph</p> kwa sababu browser inaelewa HTML language, itajua <p></p> zinamaanisha hiyo ni paragraph. Kwa kifupi HTML is used for structuring the page (DOM Document Object Model)
CSS - Cascading Style Sheets - Hii ni language for controlling how you page looks / Display. Ukitaka kitu chochote kwenye page yako kionekane tofauti, lazima utumie css. So basically css's main job is to control how your page / content display.
Javascript - Hii ni client side scripting language ambayo kazi yake kubwa ni ku control how your webpages behave. Kama unataka ku control kitu gani kitokee uki click link unatumia javascript, Hii mara nyingi inafanya kazi vizuri na css. Kama haujui css hata javascript itakupa shida sana kwa sababa most of the time javascript selectors ni sawa sawa na css selectors.
SSL Secure Socket Layer Kazi yake ni kutengeneza link kati ya web server na browser ambayo inahakikisha data zote unazopitisha kutoka kwa browser kwenda kwenye server ni sahii na salama & vice versa, data kama credit card information ni sensitive data so SSL kazi yake ni kuhakikisha zinakua salama
URL & HTTP - Won't Answer.
My Advice:
I consider people who take absolutely no self-responibility and expect to have all the answers handed to them personally rude, If you googled these words you'd get lots of good answers from various people and your knowledge on these matters would improve a lot. Everything is online be responsible and read.
