Microdata is a WHATWG HTML specification used to nest metadata within existing content on web pages. Search engines, web crawlers, and browsers can extract and process Microdata from a web page and use it to provide a richer browsing experience for users. Search engines benefit greatly from direct access to this structured data because it allows them to understand the information on web pages and provide more relevant results to users.
Reference:
https://en.wikipedia.org/wiki/Microdata_(HTML)
Example:
<div itemscope itemtype="https://schema.org/LocalBusiness">
<h1><span
itemprop="name">Irudini</span></h1>
<span
itemprop="description">Menjual berbagai Buket Bunga, Boneka, Snack, Uang,
dan Jasa Dekorasi Photobooth, Bridal Shower, Ulang Tahun, Pernikahan, dan
acara pesta lainnya.</span>
<div
itemprop="address" itemscope
itemtype="https://schema.org/PostalAddress">
<span itemprop="streetAddress">Total Persada
Jl. Jambi Blok C1 No.10 RT:001 RW:007 Kel.Gembor Kec.Periuk</span>
<span itemprop="addressLocality">Kota
Tangerang</span>
<span
itemprop="addressRegion">Banten</span>
<span
itemprop="postalCode">15133</span>
</div>
<span itemprop="telephone">+62
821-1175-6023</span>
<a itemprop="url"
href="https://www.irudini.com">www.irudini.com</a>
<time
itemprop="openingHours" datetime="Mo-Su 8:00-22:00">Every Day
8am-10pm</time>
</div>