"My website is slow" almost always traces back to one of these seven causes. Run through them in order; most can be checked without any technical knowledge.
1. Hosting
The cheapest shared hosting plans often share server resources with hundreds of other websites. If your site is slow even on a fresh, empty WordPress install, hosting is usually the cause, not your theme or plugins.
2. Unoptimised images
A single uncompressed photo straight from a phone camera can be 5 to 10 MB. Multiply that across a homepage with six images and the page can weigh 40 MB before any code even runs. Compressing and correctly sizing images is often the single biggest speed win available.
3. Too many plugins, or the wrong ones
Plugin count matters less than plugin quality. A handful of poorly coded plugins can slow a site more than twenty well-built ones. Each plugin should be earning its place: if you cannot say what it does for visitors, it is a candidate for removal.
4. No caching
Without caching, WordPress rebuilds each page from the database on every single visit. A caching plugin (or caching at the hosting level) can turn a 3-second page load into well under a second, with no design changes at all.
5. A heavy page builder
Visual page builders are convenient, but many add extra CSS and JavaScript to every page, whether or not that page uses the relevant features. This shows up clearly in a PageSpeed Insights report as "unused CSS" or "unused JavaScript".
6. No content delivery network (CDN)
If your visitors are spread across cities or countries, a CDN serves images and static files from a server near them instead of a single origin server, which noticeably helps outside your host city.
7. An outdated PHP version
Older PHP versions are both slower and a security risk. Most hosts allow you to update the PHP version in a control panel with a couple of clicks, and it is worth checking this is current.
How to check where you stand
Run your homepage through Google PageSpeed Insights. The report ranks issues by estimated impact, so you do not have to guess which of the seven points above matters most for your specific site.
See also: WordPress developer in Hyderabad and website maintenance services.