Learn Spanish (Spain): La web del museo es nueva.

While many borrowed English words in Spanish are masculine, la web is feminine because it is actually short for la página web (the web page). Since página is a feminine noun, the shortened version keeps the feminine article la.

Why does the sentence use del museo instead of an apostrophe 's like in English?

Spanish doesn't use an apostrophe 's to show possession. Instead of saying "the museum's website", you have to literally say "the website of the museum". The word del is a mandatory contraction that combines de (of) and el (the masculine "the").

Why do we use es here instead of está for "is"?

In Spanish, the verb ser (conjugated here as es) is used to describe physical characteristics, identities, and traits. Being "new" is considered a defining characteristic of this website, so we use es. We would only use está for locations, feelings, or temporary states.

Why does nueva end in an "-a"?

Adjectives in Spanish must match the gender of the noun they describe. Because the adjective is describing la web, which is feminine, the base word nuevo (new) must change to its feminine form, nueva.