Magento2: Not showing Meta title & description on category page

Question

I'm having issues with the website's meta information. If I set the default meta information, it will display the same information tag for all the pages.

But when I'm trying to set the meta info for a specific page then the Meta title and description do not display.

I have set the Meta description & title for one category. In this case, the Meta description & title tag showing for the same category page.

Solution I applied to display both the tags for category pages:

I have created one observer & set the description for the current category. But when I tried to set the title then I got the below error.

Recoverable Error: Object of class Magento\Framework\View\Page\Title could not be converted to string in /var/www/html/htdocs/vendor/magento/framework/View/Page/Config/Renderer.php on line 125

I used the below code to set the meta title & description.

$this->_pageConfig->setMetadata('title', 'some meta title');

$this->_pageConfig->setDescription($desc);

$this->_pageConfig->setKeywords($keyWrds);

Thanks for any help.

Answer 1

Use this code to set Metatitle,

$this->_pageConfig->getTitle()->set(__('Your Title'));

Answer 2

Refer block and its method,

\Magento\Catalog\Block\Category\View::_prepareLayout()

In this way you can set the meta title and Description,

$category = $this->getCurrentCategory();
if ($category) {
    $title = $category->getMetaTitle();
    if ($title) {
        $this->pageConfig->getTitle()->set($title);
    }
    $description = $category->getMetaDescription();
    if ($description) {
        $this->pageConfig->setDescription($description);
    }
    $keywords = $category->getMetaKeywords();
    if ($keywords) {
        $this->pageConfig->setKeywords($keywords);
    }
    if ($this->_categoryHelper->canUseCanonicalTag()) {
        $this->pageConfig->addRemotePageAsset(
            $category->getUrl(),
            'canonical',
            ['attributes' => ['rel' => 'canonical']]
        );
    } 

}